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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
stars232 ratings232 reviews
  1. 5 stars79% (184)
  2. 4 stars16% (36)
  3. 3 stars3% (7)
  4. 2 stars0% (1)
  5. 1 star2% (4)

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Showing 21-30 of 232 reviews
Mar 8, 2026
dimpelss
5 out of 5 stars review

Get it

I waited to write my review. We've own our mattresses maybe a mo now and it's broken in to my liking perhaps not all the way though. Off hand it was a lil firmer than i would like. I got the plush and the other is the firm both in twin xl's. Ours is paired with an adjustable base in zero clearance status and king size bed. I have moments where i can't wait to get in bed. I thought with my ailments it would help a lil more but mine are mechanical. No matter what i choose the ailments will still be there. When i can sleep it's comfortable. I first tried this in the mattress store along with the kendall model which is just flat and more contouring because of the memory foam. However that model made it harder for me to get up although i loved everything else about it. I got a great deal with the sale price of $799 for each one plus $300 back in gc form which i received appox a wk or so after delivery. I knew what i was getting and didn't go in blind when purchasing. Although i use it with my base there are no dips or anything forming in the mattress. I wish it longevity of 12 yrs as my king koil mattress. It's worth the spend.

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Apr 28, 2026
Shannon C
4 out of 5 stars review

New firmness

Firm & supportive where I need it and still comfortable enough to sleep on my side..

Review from Serta
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May 21, 2026
Kari C
5 out of 5 stars review

Comfy

Mattress is comfy and supportive. If you like a firm mattress - this is the one for you.

Review from Serta
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Apr 2, 2025
Mel V
3 out of 5 stars review

Verified Purchase

Firm

Don't have any issues with the bed or service. Customers should know this bed is very firm.

Review from Serta
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Feb 1, 2025
Emankcin
5 out of 5 stars review

Verified Purchase

Very comfortable mattress for me. Firm but not too firm. No more back ache.

Review from Serta
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May 19, 2026
Anne R
5 out of 5 stars review

New Comfy Mattress

Love it! It is so comforting and relaxing…with lots of support!

Review from Serta
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May 14, 2026
Subhashkumar P
4 out of 5 stars review

Really great I enjoyed it

Great of restful sleep. Nice o can sleep on relax

Review from Serta
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Apr 27, 2026
Arturo R
5 out of 5 stars review

comfortable

excellent mattress very comfortable firm and soft

Review from Serta
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May 3, 2026
Karen R
4 out of 5 stars review

New Mattress After 14 Years

Comfortable and Affordable

Review from Serta
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Feb 25, 2026
Allan C
5 out of 5 stars review

Great support and comfort for us side sleepers

So far our decision to replace our old Serta Icomfort Applause II was a good one. Very supportive, and provides a better night’s sleep.

Review from Serta
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