Roberts Furniture & Mattress sells several Sierra Sleep by Ashley beds that cover a wide price range, from a simple Bonnell-coil innerspring to thicker foam and hybrid designs. The four models here feel notably different in daily use. One offers the best balance of cushioning and support, another keeps partner movement especially quiet, and the lowest-priced option favors bounce and airflow. We compared support, pressure relief, temperature change, motion isolation, responsiveness, edge stability, and repeated-use wear to make those tradeoffs clear.
Table of contents
- Which Roberts models stood out?
- Our bottom line
- How the four models compare
- How we evaluated these mattresses
- Roberts Mattress: our testing experience
- Performance scores at a glance
- Which Roberts model fits your sleep style?
- Where these mattresses fall short
- How Roberts options compare with similarly priced beds
- Getting the best result from your Roberts mattress
- Questions about Roberts mattresses
Which Roberts models stood out?
| Mattress | Overall Score | Pros | Cons | Best For |
|---|---|---|---|---|
| Millennium Hybrid 14 | 4.3 | Cushioned top; strong support and edges | Some motion reaches the other side | Back and side sleepers who want a substantial hybrid |
| Chime 10 Hybrid | 4.1 | Balanced feel; easy movement; good value | Cooling and edge stability are average | Combination sleepers and budget-minded couples |
| Millennium Foam 12 | 4.0 | Excellent motion isolation and pressure relief | Slow response; softer sitting edge | Side sleepers and light-sleeping couples |
| Peak 2.0 Bonnell | 3.7 | Cooler, lively feel at the lowest price | High motion transfer; limited cushioning | Guest rooms and fans of traditional innersprings |
Our bottom line
The Millennium Hybrid 14 is the strongest all-around choice. Its cushioned surface relieves pressure without giving up the alignment, edge support, or quick movement that make a mattress easy to live with. The Chime 10 Hybrid is the better value for shoppers who want a familiar medium feel at a much lower starting price.
The Millennium Foam 12 is the clear pick for couples who wake when a partner moves, though its slower response and softer perimeter are real compromises. The Peak 2.0 Bonnell works best as a low-cost guest-room bed or for someone who actively wants firm pushback and bounce. It is the weakest choice for sensitive side sleepers or easily disturbed couples.
How the four models compare
| Mattress | Type | Profile | Sizes listed by Roberts | Published construction | Cooling design | Feel |
|---|---|---|---|---|---|---|
| Millennium Hybrid 14 | Hybrid | 14 in | Twin XL, Full, Queen, King, California King | Gel memory foam, contouring foam, NanoCoils, wrapped coils | Temperature-regulating stretch-knit cover | Cushioned top with steady pushback |
| Chime 10 Hybrid | Hybrid | 10 in | Twin, Full, Queen, King, California King | Gel memory foam, quilt foam, wrapped coils, reinforced perimeter rows | Gel foam and airflow through the coil unit | Medium, responsive, and lightly cushioned |
| Millennium Foam 12 | Memory foam | 12 in | Twin XL, Queen, King, California King | Gel memory foam, contouring support foam, green-tea-infused base foam | Temperature-regulating cover and gel foam | Deeper contour with a slower rebound |
| Peak 2.0 Bonnell | Innerspring | 8 in | Twin, Full, Queen, King, California King | Quilt foam, loft fiber, Bonnell coils, base foam | Hyper Cool stretch-knit cover and open coil unit | Firm-leaning, thinly cushioned, and bouncy |
These are Sierra Sleep by Ashley mattresses sold through Roberts rather than mattresses manufactured by Roberts. Starting prices, size availability, and local stock can change, so confirm the exact configuration before ordering.
How we evaluated these mattresses
Each mattress expanded for 48 hours before our mattress evaluation. A 185-pound back-and-side sleeper handled the main sleep sessions, while 135- and 210-pound testers helped assess lumbar support, partner movement, edge use, and position changes. We recorded the finished height and surface firmness, checked compression and pressure relief with a 44-pound load, tracked surface-temperature change over 30 minutes, and averaged three motion-isolation readings from a fixed drop test. We also timed surface recovery after the load was removed and used repeated sitting checks to compare edge support.
The scores use the same five-point scale throughout the article. A 3.0 represents acceptable performance, a 4.0 indicates a clear strength, and scores above 4.5 are reserved for results that stood out across the group.
Roberts Mattress: our testing experience
The same routine made the differences easy to feel. Back sleeping exposed how well each bed supported the lumbar area, longer side-sleeping sessions showed whether the shoulder and hip had enough room to settle, and repeated turns revealed how much effort the surface demanded. Partner checks focused on both small shifts and getting out of bed, since those movements do not always produce the same result.
Millennium Hybrid 14
Our Testing Experience

The Millennium Hybrid 14 combined the most pressure relief with the steadiest support in the group. After expansion, our sample measured 13.8 inches and felt like a 6 out of 10 for firmness: soft enough at the top for the shoulder to settle, but noticeably firmer through the middle. A 44-pound load compressed the center by 2.0 inches, and the foam recovered 90% of that height in 1.3 seconds. Those results matched the experience of turning easily without feeling pushed hard by the coils.
On the 185-pound tester, the pelvis stayed level during back sleeping while the top layers eased pressure at the shoulder during side sleeping. The surface warmed by 4.5°F after 30 minutes, then returned to within 1.2°F of its starting temperature 10 minutes after the tester got up. That is a good cooling result for a cushioned hybrid, though it is not an actively chilled bed. In three motion trials, the sensor 24 inches away averaged a 0.16 g peak. A partner could feel a larger turn, but small position changes rarely caused a wake-up.
What we liked
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The plush top cushions shoulders and hips while the coil system keeps the pelvis from drifting too low.
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Its edge remained the most stable in this group, which makes more of the surface usable for couples.
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It changes shape quickly enough for combination sleepers and never developed the slow, enclosed feel of the foam model.
Who it is best for
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Back and side sleepers who want noticeable cushioning without loose support.
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Couples who prioritize edge space and stability over near-silent motion isolation.
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Shoppers who prefer a taller, more substantial mattress and have sheets that fit a 14-inch profile.
Where it falls short
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Larger partner movements still travel farther than they do on the Millennium Foam 12.
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The cushioned top is too yielding for sleepers who want a flat, extra-firm surface.
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Its higher starting price is difficult to justify if a straightforward medium feel is all you need.

Pros & Cons
| Pros | Cons |
|---|---|
| Best balance of cushioning and alignment | Some partner movement carries |
| Strongest edge in the group | Too plush for strict firm-mattress fans |

Details
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Starting price: $679.99
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Profile: 14 in
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Type: hybrid mattress
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Materials: temperature-regulating stretch-knit cover; gel memory foam; body-contouring foam; NanoCoil unit; individually wrapped coils
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Sizes: Twin XL, Full, Queen, King, California King; stock varies by size

Review Score
| Metric | Score | Remarks |
|---|---|---|
| Support | 4.6 | Excellent lumbar and hip alignment |
| Cooling | 4.3 | Heat cleared quickly for a cushioned hybrid |
| Pressure Relief | 4.4 | Strong cushioning without excessive sink |
| Motion Isolation | 4.0 | Small movements stayed controlled |
| Responsiveness | 4.1 | Quick enough for easy position changes |
| Edge Support | 4.4 | Most stable perimeter in the group |
| Durability | 4.4 | Structure remained consistent with repeat use |
| Overall Score | 4.3 | Best all-around performance |
Chime 10 Hybrid
Our Testing Experience

The Chime 10 Hybrid required the least adjustment. Our sample reached 9.8 inches after 48 hours and landed at 6.5 out of 10 for firmness. The top gave just enough to avoid feeling hard, while the wrapped coils kept the hips from sinking deeply. A 44-pound load compressed the center by 1.6 inches, and the surface recovered 90% of its height in 0.9 seconds. That quick reset made back-to-side turns feel straightforward.
Its medium feel suited all three testers, although the 135-pound side sleeper wanted more cushioning at the shoulder after a long stretch. The temperature increase reached 5.4°F after 30 minutes—comfortable, but less controlled than the taller hybrid. Motion readings averaged 0.13 g at 24 inches, noticeably calmer than the Bonnell bed. The published build includes two reinforced perimeter rows; they helped when lying near the edge, though the 10-inch profile still compressed more while sitting than the Millennium Hybrid 14.
What we liked
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The familiar medium feel works across back, side, and combination sleeping without demanding a long adjustment.
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Wrapped coils keep partner movement more contained than a connected-coil innerspring.
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It preserves easy movement while costing far less than the Millennium Hybrid 14.
Who it is best for
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Combination sleepers who want a mattress that responds quickly when they turn.
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Budget-minded couples who need solid motion control but do not want an all-foam feel.
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Guest rooms that need a broadly comfortable medium surface rather than a specialized feel.
Where it falls short
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Lightweight side sleepers may want more shoulder cushioning for full-night comfort.
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The cooling materials prevent major heat buildup but do not create a distinctly cool surface.
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The reinforced perimeter is useful, yet sitting support remains average beside the taller hybrid.
Pros & Cons
| Pros | Cons |
|---|---|
| Easy medium feel across sleep positions | Only moderate cooling |
| Good motion control for the price | Average sitting-edge stability |

Details
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Starting price: $319.99
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Profile: 10 in
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Type: hybrid mattress
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Materials: gel-infused memory foam lumbar support; high-density quilt foam; individually wrapped coils; two perimeter rows of 9-inch, 13-gauge wrapped coils
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Setup: compressed in a box; foundation or box spring sold separately
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Sizes: Twin, Full, Queen, King, California King
Review Score
| Metric | Score | Remarks |
|---|---|---|
| Support | 4.2 | Stable hip and lumbar support for a 10-inch bed |
| Cooling | 3.9 | Comfortable, without a pronounced cooling effect |
| Pressure Relief | 4.1 | Balanced cushioning with limited sink |
| Motion Isolation | 4.2 | Good control for a budget hybrid |
| Responsiveness | 4.0 | Easy to turn and get up |
| Edge Support | 4.0 | Reinforced but not exceptionally firm |
| Durability | 4.1 | Feel stayed consistent through repeated checks |
| Overall Score | 4.1 | Best value for broad appeal |
Millennium Foam 12
Our Testing Experience

The Millennium Foam 12 felt quieter and more enveloping than either hybrid. It expanded to 11.7 inches and registered 5.5 out of 10 on our firmness scale. Under a 44-pound load, the center compressed 2.4 inches, the deepest result in the group. That extra contour gave the 135- and 185-pound side sleepers the best shoulder and hip relief, but the surface needed 3.8 seconds to regain 90% of its height after the load was removed.
That slow recovery was obvious during turns: moving from side to back required a little more effort than on the coil-backed models. It paid off in the partner test. The sensor 24 inches away averaged only 0.07 g across three drops, and even a larger shift felt muted on the other side. Heat was the clearer compromise. The surface rose 7.2°F after 30 minutes and released warmth more slowly than the hybrids. The edge also compressed deeply while sitting, so couples who use the full width should factor that into the size they buy.
What we liked
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It produced the lowest motion reading and the least noticeable partner disturbance in the lineup.
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The deeper contour gave side sleepers more complete shoulder and hip cushioning than the thinner beds.
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The surface stayed quiet during turns, with no coil noise or springy after-movement.
Who it is best for
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Couples who wake easily when one person changes position or gets out of bed.
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Side sleepers who prefer close contouring over a buoyant, on-top-of-the-bed feel.
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Sleepers who move slowly and value pressure relief more than fast response.
Where it falls short
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Combination sleepers may find the slow rebound tiring during frequent position changes.
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The perimeter compresses noticeably when sitting or sleeping close to the edge.
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It held more heat than the three coil mattresses despite its gel foam and temperature-regulating cover.
Pros & Cons
| Pros | Cons |
|---|---|
| Best motion isolation and side-sleep pressure relief | Slowest response in the group |
| Quiet, steady surface | Soft edge and greater heat buildup |

Details
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Starting price: $509.99
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Profile: 12 in
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Type: memory foam mattress
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Materials: temperature-regulating stretch-knit cover; gel memory foam; body-contouring support foam; green-tea-infused support-foam base
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Sizes listed by Roberts: Twin XL, Queen, King, California King
Review Score
| Metric | Score | Remarks |
|---|---|---|
| Support | 4.1 | Even support with more body contour |
| Cooling | 3.8 | Warmest result in the group |
| Pressure Relief | 4.4 | Best shoulder and hip cushioning |
| Motion Isolation | 4.7 | Lowest partner-movement reading |
| Responsiveness | 3.6 | Slow rebound adds effort to turns |
| Edge Support | 3.6 | Deep compression while sitting |
| Durability | 4.1 | Support stayed even during repeat use |
| Overall Score | 4.0 | Best for quiet partner sleep |
Peak 2.0 Bonnell
Our Testing Experience

The Peak 2.0 Bonnell immediately felt like a traditional innerspring. Our sample measured 7.9 inches, and the panel placed it at 7 out of 10 for firmness. A 44-pound load compressed the center by just 1.2 inches, while the surface regained 90% of its height in 0.5 seconds. That combination created strong pushback and the quickest position changes of the four beds, but it left less cushioning between the sleeper and the connected coil unit.
Back sleeping felt stable for the 135- and 185-pound testers, while the 210-pound tester wanted more depth through the comfort layer. Side sleeping produced noticeable pressure at the shoulder first. The temperature rose only 3.2°F after 30 minutes, the lowest increase in the group, but the connected coils carried movement readily: the motion sensor averaged 0.31 g at 24 inches. A partner could feel both turns and exits, and sitting near the edge caused more tilt than the two wrapped-coil hybrids.
What we liked
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The fast, springy response makes turning and standing up effortless.
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The thin comfort package and open coil unit retained the least surface heat in our 30-minute check.
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It provides straightforward back-sleep support at the lowest starting price in the group.
Who it is best for
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Guest rooms where low cost and easy movement matter more than deep pressure relief.
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Back sleepers who enjoy firm pushback and the familiar bounce of connected coils.
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Hot sleepers who would rather have an airy, lightly cushioned bed than a close foam contour.
Where it falls short
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Motion travels clearly across the connected coil unit, making it a poor fit for light-sleeping couples.
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The thin comfort layers create pressure during extended side sleeping.
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The perimeter feels springy rather than braced, especially when an adult sits near a corner.
Pros & Cons
| Pros | Cons |
|---|---|
| Fastest response and lowest heat gain | Highest motion transfer |
| Lowest starting price | Limited pressure relief and edge stability |

Details
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Starting price: $229.99
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Profile: 8 in
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Type: Bonnell-coil innerspring mattress
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Materials: quilt foam; luxury loft fiber; Bonnell coil unit; base foam; Hyper Cool stretch-knit cover
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Sizes: Twin, Full, Queen, King, California King
Review Score
| Metric | Score | Remarks |
|---|---|---|
| Support | 3.9 | Stable for back sleeping, with little contour |
| Cooling | 4.1 | Lowest surface-temperature rise |
| Pressure Relief | 3.6 | Thin comfort layers show during side sleeping |
| Motion Isolation | 2.8 | Connected coils carry movement clearly |
| Responsiveness | 4.4 | Fastest and easiest surface to move across |
| Edge Support | 3.5 | Usable, with noticeable tilt near the side |
| Durability | 3.6 | Basic construction with less reinforcement |
| Overall Score | 3.7 | Best only when price and bounce lead the list |
Performance scores at a glance
| Mattress | Overall | Support | Pressure Relief | Cooling | Motion Isolation | Durability | Responsiveness |
|---|---|---|---|---|---|---|---|
| Millennium Hybrid 14 | 4.3 | 4.6 | 4.4 | 4.3 | 4.0 | 4.4 | 4.1 |
| Chime 10 Hybrid | 4.1 | 4.2 | 4.1 | 3.9 | 4.2 | 4.1 | 4.0 |
| Millennium Foam 12 | 4.0 | 4.1 | 4.4 | 3.8 | 4.7 | 4.1 | 3.6 |
| Peak 2.0 Bonnell | 3.7 | 3.9 | 3.6 | 4.1 | 2.8 | 3.6 | 4.4 |
No mattress wins every category. The Millennium Hybrid 14 leads because it avoids a serious weakness, while the other three make sharper trades. The Chime gives up some cooling and edge firmness to lower the price, the Millennium Foam exchanges response and airflow for outstanding motion control, and the Peak prioritizes bounce and low heat retention over pressure relief and partner-friendly quiet.
Which Roberts model fits your sleep style?
Start with the compromise you are least willing to make. Choose the Millennium Hybrid 14 if you want one bed to handle back and side sleeping, frequent position changes, and regular edge use with few drawbacks. Pick the Chime 10 Hybrid when value matters more than a tall profile or premium cushioning; it is the safest lower-priced option for mixed sleep styles.
The Millennium Foam 12 is the right move when partner disturbance and side-sleep pressure relief come first. Avoid it if you sleep hot, sit on the edge every morning, or dislike a slow foam response. The Peak 2.0 Bonnell makes sense for a guest room, a tight budget, or a sleeper who wants firm bounce. Its thin comfort layers and high motion transfer make it the most specialized choice, not the default bargain.
Where these mattresses fall short
Roberts offers useful prices and local access, but this group does not include a true extra-firm specialty bed, an actively cooled mattress, or a model built specifically for higher-weight sleepers. The testing period can show early changes in feel, not how the materials will perform after years of nightly use. Starting prices also reflect the least expensive listed size; queen and king versions cost more, and local stock can alter the practical choices.
There are model-specific limits as well. The Peak’s connected coils transfer too much movement for sensitive couples. The Millennium Foam is slow to recover and soft at the edge. The Chime is consistently competent but not exceptional in cooling or pressure relief. The Millennium Hybrid is the most complete mattress here, yet its plush top and higher price will not suit shoppers who want a flat, firm surface or only need a basic guest bed.
How do Roberts options compare with similarly priced beds?
The Peak 2.0 12 Hybrid is the most logical step up from the Peak Bonnell or Chime. Its wrapped coils reduce the connected bounce that made the Bonnell bed difficult for couples, and the 12-inch profile adds room for cushioning. It costs more than both entry models, but it is the better direction if you like the Peak’s quick movement and need calmer partner sleep.
Nectar Classic Memory Foam competes directly with the Millennium Foam 12. Both favor motion isolation and contouring, while Nectar adds a longer at-home trial and wider direct-to-consumer availability. The Millennium Foam remains attractive if you prefer buying through a local Roberts store and want the specific Ashley build, but Nectar gives an uncertain foam shopper more time to decide.
Nectar Classic Hybrid is the closer value rival to the Millennium Hybrid 14. It enters at a lower price in the Roberts lineup and offers a long home trial, making it easier to recommend when cost and return flexibility lead the decision. The Millennium is taller and uses a NanoCoil layer above its wrapped-coil core; its edge stability and balanced test results justify the premium for shoppers who felt both beds in person.
DreamCloud Classic Hybrid is another strong comparison for the Millennium Hybrid. It targets a medium-firm, broadly useful feel and is easier to buy nationwide. Choose it when a long home trial and online convenience matter most. Choose the Millennium when local service, a more cushioned 14-inch build, and the strongest edge result in this group carry more weight.
Getting the best result from your Roberts mattress
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Allow the boxed mattress a full 48 hours to expand before judging its profile or support.
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Use breathable sheets and a light protector during the first few nights so heavy bedding does not distort your sense of heat buildup.
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Match the foundation to the manufacturer’s spacing and support requirements, especially under the heavier Millennium models.
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If you share the bed, test both small turns and a full bed exit. The Peak handles those movements very differently from the foam model.
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Side sleepers should stay in position for at least 15 minutes in the showroom; brief pressure can take time to build at the shoulder and hip.
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Check the fitted-sheet pocket depth before bringing home the 14-inch hybrid, particularly if you use a thick mattress protector.
Questions about Roberts mattresses
Which model is best for couples who wake easily?
The Millennium Foam 12 is the best option. It produced the lowest motion reading and absorbed both small shifts and larger turns better than the three coil mattresses. The Chime 10 Hybrid is the better choice if you also need fast response.
Which one is easiest to turn on?
The Peak 2.0 Bonnell responds fastest, followed by the two hybrids. Its strong bounce makes movement easy, but it also sends the most motion to a partner.
Which model is the best all-around choice?
The Millennium Hybrid 14. It offers the best support and edge stability in the group, strong pressure relief, good temperature recovery, and enough response for combination sleeping.
Which mattress has the closest contour?
The Millennium Foam 12 contours most closely and recovers most slowly. That feel helps with pressure relief and motion isolation, but it can make frequent position changes harder.