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Customer reviews for Serta Perfect Sleeper X Knox Hybrid Mattress for
Serta Perfect Sleeper X Knox Hybrid Mattress
4.7 out of 5 stars
stars
249 ratings249 reviews
  1. 5 stars79% (197)
  2. 4 stars15% (38)
  3. 3 stars3% (7)
  4. 2 stars1% (2)
  5. 1 star2% (5)

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Showing 71-80 of 249 reviews
Oct 13, 2025
Barbara E
3 out of 5 stars
3 out of 5 stars review

Adjustable bed

I like the bed but unhappy that I cannot use my head board and it is difficult to keep the top sheet secured.

Review from Serta
Helpful?1L02F9H4SZMK15241712141
Apr 19, 2025
CA2025
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

GREAT MATRESS !!

Perfect firmness for both my wife and my needs. Slept like I didn't have kids waking me up every few hours again.

Review from Serta
Helpful?1L02F9H4SZMK15241712141
Nov 3, 2024
mikeinaples
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Bouncy firm;)

I traded a firm which was very soft- I’d guess medium at most, but the extra firm is perfect for those who prefer a firm bed.

Review from Serta
Helpful?1L02F9H4SZMK15241712141
Apr 7, 2025
Dan24
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Very comfortable.

I’m very happy with my new mattress. I’ve been using it for a few weeks now, and my body feels more rusted and less pain when waking up.

Review from Serta
Helpful?1L02F9H4SZMK15241712141
May 8, 2026
Olsi G
5 out of 5 stars
5 out of 5 stars review

Nice

Nice mattress

Review from Serta
Helpful?1L02F9H4SZMK15241712141
Sep 27, 2024
rebandwrath
5 out of 5 stars
5 out of 5 stars review

Perfect

[This review was collected as part of a promotion.] The most comfortable bed I have ever slept on in my life. It’s cooling too so it’s perfect for the summer when it’s too hot to sleep. Breathes easy and supports my body weight and heavy dogs with me.

Review from Serta
Helpful?1L02F9H4SZMK15241712141
Sep 25, 2024
aur0raxxborealis_8663
5 out of 5 stars
5 out of 5 stars review

Firm and hefty!

[This review was collected as part of a promotion.] The Perfect SIeeper Quilted Hybrid was aesthetically, a very clean beautiful mattress with quite a bit of thickness and heft, which made setting it up a bit challenging without assistance. The weight does add to the sense of durability and sturdiness. I was pleasantly surprised to find no odor, which is often an issue with newer mattresses. Most notably though, the mattress is quite firm, which is the style I selected. It's exactly as advertised, very firm. There is little cushion or give but provides great support. I would not recommend this mattress if someone wants to "sleep on a cloud" but rather, would be ideal for those needing extra back support. For anyone looking for a firm mattress that feels built to last, this one would be a great choice.

Review from Serta
Helpful?1L02F9H4SZMK15241712141
Jun 26, 2025
Eric T
5 out of 5 stars
5 out of 5 stars review

Great mattress - beautiful, well designed, and very comfortable

Love this mattress. Beautiful design and very comfortable. It has good support and a lovely cushioned top. Independent coil design with five comfort points is ingenious. We looked at every other brand, and this mattress was by far the best-designed and most competitively priced one we could find. Highly recommended.

Review from Serta
Helpful?1L02F9H4SZMK15241712141
Mar 9, 2025
Michelle S
5 out of 5 stars
5 out of 5 stars review

Fantastic support!

This mattress is so comfortable! Perfect amount of softness on the top to support my curves with great firm support beneath. I am just giddy to climb into bed each night. I don't know why I didn't buy a new mattress sooner. I had no idea what I was missing!

Review from Serta
Helpful?1L02F9H4SZMK15241712141
Sep 8, 2024
girlchickbetty
5 out of 5 stars
5 out of 5 stars review

Supportive and so comfortable

[This review was collected as part of a promotion.] This is the most comfortable mattress that I've ever owned! I've bought all sorts of toppers in the past to try to make our old mattresses more comfortable but this one has been amazing straight from the box! It didn't need to air out and had zero off gassing smells. I usually feel unsupported on my lower back but this pillow top really fills out your curves and supports everywhere. The floral design is very cute, I do worry that it might pill but haven't had any issues yet.

Review from Serta
Helpful?1L02F9H4SZMK15241712141