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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
stars229 ratings229 reviews
  1. 5 stars79% (181)
  2. 4 stars16% (36)
  3. 3 stars3% (7)
  4. 2 stars0% (1)
  5. 1 star2% (4)

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Showing 31-40 of 229 reviews
Apr 24, 2026
Elona C
5 out of 5 stars review

My new bed

My mattress is comfortable and allows a good night rest.

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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Apr 12, 2026
Marc G
4 out of 5 stars review

Comfortable

Comfy mattress, I don't like the blue floral color fabric, only draw back.

Review from Serta
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Apr 14, 2026
Bill H
5 out of 5 stars review

Knox firm

A few days in. So far so good. Needed firm mattress. Waking up without pain

Review from Serta
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Mar 21, 2026
Wayne W
5 out of 5 stars review

Excellent mattress

We like the mattress very much

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Mar 27, 2026
Trent W
5 out of 5 stars review

Nice mattress

Firm but not extra firm with some top foam. It's nice!

Review from Serta
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Jan 10, 2026
Henry D
5 out of 5 stars review

So far only 2 nights in

So far so good. Went from queen to king. Plenty of room now for the 2 of us. Seems to be doing it's job.

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Dec 13, 2025
Linda S
1 out of 5 stars review

Sink hole

When I first got this replacement, it was great, and now, for the last four months I've been dealing with a sink hole and is killing my lower back.

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Dec 25, 2025
Gloria S
5 out of 5 stars review

serta perfect sleeper x Knox 13.5

The mattress is super firm and comfortable. I am happy. I recommend for people who have joint bone problems and especially the back

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Oct 13, 2025
Barbara E
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
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