We compared four Serta Perfect Sleeper Ultimate innerspring models: Extra Firm, Firm Pillow Top, Medium Pillow Top, and Plush. All four feel responsive and keep the lower back well supported, but they handle pressure very differently. Medium Pillow Top is the most versatile choice, Extra Firm offers the strongest hip support, and Plush gives side sleepers the most room at the shoulders and hips.
Table of Contents
- Which Model Fits Best?
- What Stood Out Across the Line
- How the Four Models Differ
- How We Evaluated the Mattresses
- Ultimate Mattress: Our Testing Experience
- How the Models Scored Side by Side
- Which Firmness Should You Choose?
- Where the Line Falls Short
- How These Models Compare with Alternatives
- How to Try and Care for the Mattress
- FAQs
Which Model Fits Best?
| Mattress | Overall Score | Pros | Cons | Ideal For |
|---|---|---|---|---|
| Ultimate Extra Firm | 4.2 | Strong lumbar and hip support; stable edge | Too rigid for most side sleepers | Back and stomach sleepers |
| Ultimate Firm Pillow Top | 4.2 | Firm support with a cushioned surface | Limited give at side-sleep pressure points | Back and stomach sleepers who want some padding |
| Ultimate Medium Pillow Top | 4.2 | Best balance across positions; easier to share | Not ideal for people who want a distinctly firm or plush feel | Combination sleepers and couples |
| Ultimate Plush | 4.1 | Strongest pressure relief at the shoulders and hips | Allows too much hip sink for strict stomach sleepers | Side sleepers |
What Stood Out Across the Line
Marcus preferred Extra Firm for stomach sleeping because it kept his hips closest to level. It is the clearest choice for sleepers who value support over cushioning, but it is also the least forgiving at the shoulders.
Firm Pillow Top keeps much of that stable feel while taking the hard edge off the surface. It works well for back and stomach sleepers who find Extra Firm too severe but still want to stay on top of the mattress.
Jenna and Ethan favored Medium Pillow Top for sharing. It did not eliminate movement, but it absorbed changes in position better than the firmer models and offered the best overall balance for two sleepers.
Plush stood apart for side-sleep comfort. It eased pressure more effectively than the other three, though Dr. Adrian Walker noted that its deeper give made alignment less reliable for strict stomach sleepers. Across this zoned-support line, the best result came from matching the firmness to body weight and sleep position.
How the Four Models Differ
| Model | Feel | Profile | Type | Cooling | Construction | Best For | Trial / Warranty |
|---|---|---|---|---|---|---|---|
| Extra Firm | Extra firm | 12" | Innerspring | CoolFeel cover | Zoned support; cushioning foams; gel lumbar band; foam rail | Stomach and back sleepers | Seller-dependent trial; 10-year limited warranty |
| Firm Pillow Top | Firm with a cushioned top | 14.5" | Innerspring | CoolFeel cover | Zoned support; cushioning foams; gel lumbar band; foam rail | Stomach and back sleepers | Seller-dependent trial; 10-year limited warranty |
| Medium Pillow Top | Medium | 14.5" | Innerspring | CoolFeel cover | Zoned support; cushioning foams; gel lumbar band; foam rail | Combination sleepers and couples | Seller-dependent trial; 10-year limited warranty |
| Plush | Plush | 13.25" | Innerspring | CoolFeel cover | Zoned support; cushioning foams; gel lumbar band; foam rail | Side sleepers | Seller-dependent trial; 10-year limited warranty |
How We Evaluated the Mattresses
Each mattress went through repeated overnight use as part of our mattress testing process, followed by structured checks for support, cooling, pressure relief, motion isolation, responsiveness, and edge support. We measured the samples, rated their perceived firmness, compared compression under a fixed load, recorded vibration from repeated ball drops, and checked recovery after the load was removed. Overnight notes focused on alignment, pressure buildup, heat, position changes, edge use, and partner disturbance. The final scores use a five-point scale.
Ultimate Mattress: Our Testing Experience
Ultimate Extra Firm
Our Testing Experience

Extra Firm kept us on top of the mattress with almost no slow sink. Our sample measured 12 inches and felt like an 8.5 out of 10 for firmness. A 44-pound load compressed the comfort layers by 1.1 inches, the least in the group. That resistance kept my hips level on my back and stomach, and Marcus could turn without pushing himself out of an impression.
The firm surface also gave this model the kind of stability expected from a mattress with strong edge support. Under the same seated load, the perimeter compressed 1.6 inches compared with 1.2 inches at the center. Motion traveled farther than it did on the softer models: a repeated 10-pound ball drop registered an average peak of 0.18g at a sensor 36 inches away. Jenna and Ethan could feel each other turn, even though the vibration settled quickly.
What we liked
- Excellent lift under the hips and lower back
- A flat, stable surface for back and stomach sleeping
- A firm edge that feels secure when sitting or standing
Who it is best for
- Stomach sleepers who need strong hip support
- Back sleepers who prefer minimal sink
- Heavier sleepers who feel trapped by deep contouring
Where it falls short
- It concentrates pressure at the shoulder and outer hip during side sleeping.
- It offers little of the close contour some sleepers expect from foam.
- Its responsive surface carries more partner movement than the pillow-top models.

Pros & Cons
| Pros | Cons |
|---|---|
| Exceptional lumbar and hip support | Harsh at side-sleep pressure points |
| Stable edge and easy movement | Transfers more partner movement |

Details
- Availability: Varies by retailer
- Feel: Extra firm
- Profile: 12"
- Sizes: Twin, Twin XL, Full, Queen, King, Cal King
- Cooling: CoolFeel cover
- Construction: PillowSoft Aire foam, gel lumbar band, coil system, extra-deep foam rail
- Trial / Warranty: Trial and returns vary by seller; 10-year limited warranty
Review Score
| Metric | Score | Remarks |
|---|---|---|
| Support | 4.7 | Excellent hip lift |
| Cooling | 4.0 | Cool initially; some heat buildup |
| Pressure Relief | 3.6 | Comfortable on the back; rigid on the side |
| Motion Isolation | 3.9 | Movement is noticeable but settles quickly |
| Responsiveness | 4.2 | Easy to turn |
| Edge Support | 4.4 | Secure sitting edge |
| Durability | 4.5 | Dense, stable build |
| Overall Score | 4.2 | Best for support-first sleepers |
Ultimate Firm Pillow Top
Our Testing Experience

The Firm Pillow Top softens the first contact without changing the supportive character underneath. The 14.5-inch sample felt like a 7.5 out of 10, and a 44-pound load sank 1.5 inches into the top. That extra half-inch of give was enough to ease pressure around my ribs and shoulder, while Marcus still felt well supported through the hips.
It was calmer than Extra Firm when Jenna or Ethan changed position. The same ball-drop setup produced a 0.15g peak at 36 inches, and the vibration faded within 0.7 seconds. The edge compressed 1.8 inches under the seated load but never felt as if it would fold. This model works best for someone who wants clear resistance with a less abrupt surface.
What we liked
- Firm alignment support without the hard first contact of Extra Firm
- More room at the ribs and shoulders than the flattest model
- A responsive surface that does not resist position changes
Who it is best for
- Back and stomach sleepers who want light cushioning
- Combination sleepers who dislike deep sink
- Couples who both prefer a traditional, supportive feel
Where it falls short
- Pressure-sensitive side sleepers may still find the shoulder area too firm.
- Partner movement remains easier to detect than on foam-heavy beds.
- The pillow top cushions the surface but does not create a deep contour.

Pros & Cons
| Pros | Cons |
|---|---|
| Strong support with a cushioned surface | Still firm for pressure-sensitive side sleepers |
| Stable edge and quick response | Does not fully absorb partner movement |

Details
- Availability: Varies by retailer
- Feel: Firm pillow top
- Profile: 14.5"
- Sizes: Twin, Twin XL, Full, Queen, King, Cal King
- Cooling: CoolFeel cover
- Construction: PillowSoft Aire foam, gel lumbar band, coil system, extra-deep foam rail
- Trial / Warranty: Trial and returns vary by seller; 10-year limited warranty
Review Score
| Metric | Score | Remarks |
|---|---|---|
| Support | 4.5 | Strong midsection support |
| Cooling | 4.0 | Cool initially; room conditions matter |
| Pressure Relief | 4.0 | More forgiving than Extra Firm, but not plush |
| Motion Isolation | 4.0 | Softens movement without erasing it |
| Responsiveness | 4.1 | Quick, natural turns |
| Edge Support | 4.3 | Reliable perimeter |
| Durability | 4.4 | Stable construction |
| Overall Score | 4.2 | A strong firm-but-cushioned option |
Ultimate Medium Pillow Top
Our Testing Experience

Medium Pillow Top was the easiest model to use across a full night of position changes. Our sample measured 14.5 inches and felt like a 6 out of 10, close to what most shoppers expect from a medium-firm mattress. A 44-pound load compressed the surface by 1.8 inches, giving my shoulder room when I moved onto my side without letting my hips drift too far when I rolled onto my back.
It also gave Jenna and Ethan the best overall couple balance. Ball-drop transfer averaged 0.12g at 36 inches, lower than on the two firmer mattresses, and the surface recovered to 90% of its original height in 1.1 seconds after the load was removed. Marcus wanted more resistance for stomach sleeping, but none of the other models worked as comfortably across so many positions.
What we liked
- The most even balance of contouring and support in the lineup
- Enough flexibility for households with different sleep positions
- Better control of partner movement than the firmer models
Who it is best for
- Combination sleepers who change positions often
- Couples with different comfort preferences
- Back sleepers who want cushioning without deep sink
Where it falls short
- Strict stomach sleepers may want the flatter support of a firmer model.
- Heavier sleepers who dislike any hip sink may find it too flexible.
- Its balanced feel can seem indistinct to people who strongly prefer firm or plush.

Pros & Cons
| Pros | Cons |
|---|---|
| Most consistent performance across positions | Too neutral for strong firmness preferences |
| Smooth position changes and good couple balance | Not rigid enough for every stomach sleeper |

Details
- Availability: Varies by retailer; may use a retailer-specific model name
- Feel: Medium pillow top
- Profile: 14.5"
- Sizes: Twin, Twin XL, Full, Queen, King, Cal King
- Cooling: CoolFeel cover
- Construction: PillowSoft Aire foam, gel lumbar band, coil system, extra-deep foam rail
- Trial / Warranty: Trial and returns vary by seller; 10-year limited warranty
Review Score
| Metric | Score | Remarks |
|---|---|---|
| Support | 4.2 | Steady through position changes |
| Cooling | 4.0 | Cool surface; moderate heat retention |
| Pressure Relief | 4.3 | Balanced cushioning at the shoulders and hips |
| Motion Isolation | 4.2 | Best overall couple balance |
| Responsiveness | 4.0 | Smooth, easy turns |
| Edge Support | 4.3 | Strong perimeter |
| Durability | 4.3 | Maintained a consistent feel |
| Overall Score | 4.2 | The most versatile choice |
Ultimate Plush
Our Testing Experience

Plush delivered the best pressure relief in the group when I settled onto my side. The 13.25-inch sample felt like a 4.5 out of 10, and a 44-pound load sank 2.3 inches. On the pressure mat, the high-pressure area around my shoulder was 17% smaller than it was on Extra Firm, which matched the immediate difference I felt.
The extra contour came with slower movement. After the load was removed, the surface took 2 seconds to recover to 90% of its height, nearly twice as long as Medium Pillow Top. Motion transfer still averaged a respectable 0.12g at 36 inches, but Marcus felt his hips sink too far on his stomach. This is a side-sleeper model, not a softer all-position version of the firmer beds. It is also the 13.25-inch Plush, not the separate Plush Pillow Top.
What we liked
- The strongest shoulder and hip pressure relief in the lineup
- A gentle surface without the dense, slow feel of all-foam beds
- Enough cushioning for side sleeping and bedtime reading
Who it is best for
- Side sleepers who need more room at the shoulder and hip
- Lighter and average-weight sleepers who find firm beds uncomfortable
- People who want a softer innerspring feel without a deep foam hug
Where it falls short
- Strict stomach sleepers may feel their hips drop below the rest of the body.
- Heavier sleepers may need more resistance through the center.
- Its slower recovery makes position changes less effortless than on Extra Firm.

Pros & Cons
| Pros | Cons |
|---|---|
| Best side-sleep pressure relief | Allows more hip sink |
| Soft surface with some innerspring response | Slower to recover after compression |

Details
- Availability: Varies by retailer
- Feel: Plush
- Profile: 13.25"
- Sizes: Twin, Twin XL, Full, Queen, King, Cal King
- Cooling: CoolFeel cover
- Construction: PillowSoft Aire foam, gel lumbar band, coil system, extra-deep foam rail
- Trial / Warranty: Trial and returns vary by seller; 10-year limited warranty
Review Score
| Metric | Score | Remarks |
|---|---|---|
| Support | 3.9 | Adequate for side and back sleep; soft for stomach sleep |
| Cooling | 3.9 | Cool initially; warmer over time |
| Pressure Relief | 4.5 | Best at the shoulders and hips |
| Motion Isolation | 4.2 | Cushions impact but does not eliminate movement |
| Responsiveness | 3.8 | Slowest recovery in the group |
| Edge Support | 4.1 | Usable but softer |
| Durability | 4.1 | Solid build with softer comfort layers |
| Overall Score | 4.1 | Best for side-sleep comfort |
How the Models Scored Side by Side
| Mattress | Overall Score | Support | Pressure Relief | Cooling | Motion Isolation | Durability | Responsiveness | Edge Support |
|---|---|---|---|---|---|---|---|---|
| Extra Firm | 4.2 | 4.7 | 3.6 | 4.0 | 3.9 | 4.5 | 4.2 | 4.4 |
| Firm Pillow Top | 4.2 | 4.5 | 4.0 | 4.0 | 4.0 | 4.4 | 4.1 | 4.3 |
| Medium Pillow Top | 4.2 | 4.2 | 4.3 | 4.0 | 4.2 | 4.3 | 4.0 | 4.3 |
| Plush | 4.1 | 3.9 | 4.5 | 3.9 | 4.2 | 4.1 | 3.8 | 4.1 |
Medium Pillow Top delivered the most balanced results. Extra Firm led support and Plush led pressure relief, while Medium Pillow Top and Plush tied for the highest motion-isolation score. Medium Pillow Top remains the stronger all-around choice for couples because it combines that motion control with quicker recovery and steadier edge support.
Which Firmness Should You Choose?
Start with sleep position and body weight. Extra Firm offers the strongest resistance for stomach sleepers and back sleepers who want almost no sink. Firm Pillow Top is the better choice when you want similar support with a more forgiving surface. Plush gives side sleepers the most pressure relief, while Medium Pillow Top is the safest starting point for combination sleepers or people who share a bed.
Do not choose by the word “cooling” alone. The CoolFeel cover felt cool at first, but these mattresses did not continuously pull away heat. Hot sleepers should also use breathable sheets and avoid thick protectors or toppers that trap warmth. Because this is an older assortment with retailer-specific names, confirm the profile, comfort level, return policy, and warranty before ordering.
Where the Line Falls Short
Every model retains a traditional innerspring character. Sleepers looking for a deep memory foam contour will feel more surface response and more partner movement here. Extra Firm is uncomfortable at side-sleep pressure points, while Plush gives strict stomach sleepers too little resistance through the hips. The two pillow-top models moderate those extremes without fully matching the motion absorption of a foam-heavy mattress.
How These Models Compare with Alternatives
The four Serta models make the most sense if you want familiar innerspring response, clear firmness steps, and zoned lower-back support. They are easier to move across than slow memory foam, and Extra Firm and Firm Pillow Top offer particularly dependable edges. Their main weaknesses are uneven pressure relief across sleep positions and only moderate motion control.
Saatva Classic is the more premium innerspring alternative. It offers three comfort levels, a Euro pillow top, and a dual-coil design with strong airflow and lumbar support. It typically costs more, but the longer home trial, in-room setup, and broader premium service package make the difference easier to justify for shoppers who want a more polished traditional mattress.
Tempur-Pedic Adapt is the better direction if pressure relief and motion absorption matter more than bounce. Its dense, close-contouring material isolates movement more effectively than these Serta models, while the hybrid version restores some edge support and ease of movement. Expect a slower feel and a substantially higher price.
Sleep Number p5 suits couples who cannot agree on one fixed firmness. Each side can be adjusted independently, and the bed can respond to changes through the night. That flexibility is useful, but the system costs more and introduces pumps, controls, and connected components that a conventional Serta innerspring does not require.
How to Try and Care for the Mattress
- Spend at least 10 minutes in your usual sleep position before judging the feel.
- If Extra Firm creates pressure at the hips, try Firm Pillow Top before moving all the way to Plush.
- Use breathable sheets and avoid a thick topper if heat is a concern.
- Rotate the mattress regularly so the comfort layers break in evenly.
- Sit and lie near the edge if you rely on the perimeter for getting in and out of bed.
- Match the model name, profile, and comfort level across seller listings before buying.
FAQs
Which Ultimate Mattress model is best for side sleepers?
Plush gives the shoulder and outer hip the most room and earned the highest pressure-relief score. Medium Pillow Top is the better choice if you regularly switch between your side and back.
Which model works best for couples?
Medium Pillow Top offers the best mix of motion control, quick recovery, and support for different sleep positions. Plush tied its motion-isolation score but is less stable for stomach sleepers and people who need stronger hip support.
How do I choose between Extra Firm and Firm Pillow Top?
Choose Extra Firm for the flattest, most resistant surface. Choose Firm Pillow Top if you want nearly the same back and hip support with more cushioning at the ribs, shoulders, and knees.