Mancini's Mattress Reviews (2026)

Onyx Medium was the most balanced for everyday back/side switching: supportive through the hips, easy to move on, and calmer on heat than the all‑foam options once the room warmed up.

Diamond Euro Top was the easiest on shoulders for our lightest tester, but our heavier tester noticed more sink when he drifted toward stomach sleeping. Marina Firm muted motion best at the lowest price, while Granite Bay Firm delivered the steadiest alignment and motion control—with a more cautious edge feel.

Each mattress went through the same scorecard: alignment support, heat buildup, shoulder/hip pressure relief, partner‑movement transfer, ease of turning, edge stability, and early durability signals based on materials and how quickly the surface softened.

Our panel covered a range of body types—me (5'10", ~185 lbs), Marcus (6'1", ~230 lbs), Carlos (5'11", ~175 lbs), and Mia (5'4", ~125 lbs)—so we could see how the same design scaled across weights and sleep styles.

Our testing experience

On the first night, the Onyx Medium felt like the “default setting” in the best way. I could start on my side, roll to my back, and never feel pitched into a groove or stuck in place. The pocketed coils kept my hips from dipping, while the top had enough give that my lower back didn’t feel tight the next morning. Marcus liked that it stayed flatter under his midsection, and Mia could settle her shoulder without the surface turning mushy. Compared with the foam models, it also held onto less heat once the room warmed up.

What we liked:

• Supportive pocketed coils with a calmer, less bouncy surface

• Cooling and edge-support callouts made the full width feel usable

Who it is best for:

• Combination sleepers who switch positions often

• Couples who want easier movement without a “trampoline” feel

Where it falls short:

• Good motion control, but not as “dead quiet” as foam

Pros & Cons

Details

• Price: From $799.99; Queen $1,099.99

• Type: Innerspring

• Firmness: Medium

• Height: 13"

• Available sizes (as shown): Twin, Twin XL, Full, Cal King, Split Cal King, Eastern King, Queen

• Cover material: Polyester Knit

• Quilting layers: 2 H.D. Super Soft Quilt Foam; 3/4 H.D. Gel Infused M-Foam

• Comfort layers: 1" Med-Firm H.D. Foam + 1.5" Extra Firm H.D. Support Foam

• Support system: 8" 840 Pocketed Coil; 1.0" Shock Absorbing H.D. Base Foam

• Adjustable base compatible: Yes

• Motion separation (listed): Yes

• Cooling (listed): Cooling technology

• Edge support (listed): Yes

• Mattress in a box: No

• Warranty: 10 Year

• Store guarantees shown: Best Price Guarantee; comfort‑guarantee messaging including a 365‑night upgrade with protector

Review score

Our testing experience

The Diamond Euro Top had the quickest “sink‑in” at the shoulders. On my side, my upper back and ribs settled faster than on the firmer models, and it was the easiest bed for side sleeping in this group. On my back, I had to pay a bit more attention to hip position because the plush top lets you settle deeper. Mia liked that it didn’t push back at her shoulder, and Carlos said the transition into the coil unit felt smooth. Marcus noticed more sink when he drifted toward stomach sleeping.

What we liked:

• Plush Euro‑top feel that eased shoulder pressure

• Pocketed coils kept it from feeling flat or dead

Who it is best for:

• Side sleepers who want a softer landing

• Back sleepers who like plushness on top of coils

Where it falls short:

• Cooling and motion control are mid‑pack versus the best foam beds

Pros & Cons

Details

• Price: From $599.99; Queen $699.99

• Type: Innerspring

• Firmness: Euro Top

• Height: 12.5"

• Available sizes (as shown): Cal King, Split Cal King, Twin, Eastern King, Twin XL, Full, Queen

• Cover material: Polyester Knit

• Quilting layers: 2 H.D. Super Soft Quilt Foam

• Comfort layers: 2" super‑soft HD support foam

• Support system: 8" 790 Pocketed Coil; 3/4" Shock Absorbing H.D. Base Foam

• Adjustable base compatible: Yes

• Motion separation (listed): Yes

• Edge support (listed): Yes

• Mattress in a box: No

• Warranty: 10 Year

• Store guarantees shown: Best Price Guarantee; comfort‑guarantee messaging including a 365‑night upgrade with protector

Review score

Our testing experience

Marina Firm is the simplest build in this group, and it feels that way: firm, quiet, and straightforward. On my back it held me up cleanly, and my lower back stayed supported. On my side, the thinner comfort stack showed up sooner—my shoulder didn’t sink as easily as it did on the Euro‑top. Marcus liked the firmer pushback for stomach time, while Mia called it supportive but not very forgiving. Once the foam settled, small movements stayed localized better than on the coil models.

What we liked:

• Strong motion isolation for the money

• Firm feel that suits back and stomach sleeping

Who it is best for:

• Guest rooms and budget‑focused shoppers

• People who dislike bounce and prefer firmer foam

Where it falls short:

• Limited pressure relief for sensitive shoulders/hips, especially for side sleepers

Pros & Cons

Details

• Price: From $459.99; Queen $599.99

• Type: Memory Foam

• Firmness: Firm

• Height: 8"

• Available sizes (as shown): Twin, Twin XL, Full, Cal King, Eastern King, Queen

• Cover material: Polyethylene & Poly Blend

• Quilting layers: 0.75 1.8 /10 Gel Infused Memory Foam

• Comfort layers: 1" 3/10 Titanium Memory Foam

• Support system: 6.0 1.5 / 30 Base Foam

• Adjustable base compatible: Yes

• Motion separation (listed): Yes

• Edge support (listed): Yes

• Mattress in a box: No

• Warranty: 10 Year

• Store guarantees shown: Best Price Guarantee; comfort‑guarantee messaging including a 365‑night upgrade with protector

Review score

Our testing experience

Granite Bay Firm was the most “platform” feeling option—thicker, firmer, and stable from the first few minutes. On my back, my lumbar stayed supported without me having to hunt for the right spot. When I rolled to my side, I got contouring without a deep, slow sink, so it felt easier to move on than very slow foams. Carlos liked the straighter alignment over time. Mia could side‑sleep for a while but still preferred the Euro‑top for shoulder comfort. The trade‑off showed up at the perimeter: without an edge‑support callout, I felt more cautious sitting or sleeping close to the edge than I did on Onyx.

What we liked:

• Strong, stable support with a firm foam feel

• Excellent motion isolation without feeling overly “stuck”

Who it is best for:

• Back sleepers and heavier sleepers who want a firmer platform

• Couples who prioritize low motion transfer

Where it falls short:

• Edge confidence is lower than models with explicit edge‑support specs

Pros & Cons

Details

• Price: From $1,299.99; Queen $1,599.99

• Type: Foam

• Firmness: Firm

• Height: 13"

• Available sizes (as shown): Full, Cal King, Eastern King, Twin, Twin XL, Split Cal King, Queen

• Cover material: Polyethylene & Poly Blend

• Quilting layers: Smooth Top

• Comfort layers: 1" 4.0 / 13 Titanium M-Foam; 2" 3/10 Titanium M-Foam

• Support system: 2.0 1.8 / 18 transition over 8.0 1.8 / 36 H.D Base Foam

• Adjustable base compatible: Yes

• Motion separation (listed): Yes

• Edge support: -

• Mattress in a box: No

• Warranty: 10 Year

• Cooling notes (listing): “Cold” stretch knit quilt panel plus graphite/copper/titanium callouts in the description

• Store guarantees shown: Best Price Guarantee; comfort‑guarantee messaging including a 365‑night upgrade with protector

Review score

Scores lined up with what we felt in person. Onyx Medium was the most balanced across categories. Diamond Euro Top led this group in pressure relief. Marina Firm delivered the best motion isolation but lagged in responsiveness and pressure relief. Granite Bay Firm stood out for support and motion control, with edge stability as the main trade‑off.

• Choose Onyx Medium if you regularly switch between back and side and want the best mix of support and easy movement.

• Choose Diamond Euro Top if you’re a lighter side sleeper who needs the most pressure relief in this set.

• Choose Marina Firm if you want a firm, affordable option for a guest room and don’t need deep cushioning.

• Choose Granite Bay Firm if you want a firmer foam platform with strong alignment and low motion transfer.

There are clear trade‑offs in this lineup. The firmer foam models can feel less forgiving at the shoulders and hips for sensitive side sleepers, while the coil models are easier to move on but don’t match foam for motion isolation.

Marina’s thinner profile is the least cushy option here, and Granite Bay’s edge felt less secure than models that explicitly advertise edge support.

These models make sense if you want to shop a range of constructions—innerspring and foam—and you value store perks like comfort‑guarantee messaging and local delivery. If you prefer a boxed, online‑direct all‑foam feel, a common alternative is Nectar Classic. If you want a premium, slow‑responding foam feel from a long‑established brand, Tempur‑Pedic’s TEMPUR‑Adapt line is another typical cross‑shop.

• Give yourself about two full weeks before you label a mattress “too firm.” Early stiffness can be normal even when alignment is good.

• If you’re side sleeping on a firmer model, try a thinner pressure‑relieving topper before you switch mattresses.

• For coil models, use a supportive foundation so the center and edges don’t soften unevenly over time.

• Rotate head‑to‑foot on a schedule (if the build allows) to even out early body impressions.

• If you sleep hot, focus on breathable bedding and a lighter comforter—temperature control is more than the mattress surface.

• For couples, test motion isolation with real routines (one person gets up, the other stays) instead of quick showroom bounces.

• During testing, spend time on the outer third. Edge confidence affects daily use, not just sitting.

• If you use an adjustable base, double‑check that the mattress is listed as compatible before you commit.

• Keep a simple sleep log (wake‑ups, back tightness, shoulder pressure) so any comfort‑guarantee decision is based on patterns, not one bad night.