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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
stars237 ratings237 reviews
  1. 5 stars79% (188)
  2. 4 stars16% (37)
  3. 3 stars3% (7)
  4. 2 stars0% (1)
  5. 1 star2% (4)

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Showing 31-40 of 237 reviews
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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Mar 21, 2026
Cari T
4 out of 5 stars review

Perfect Sleeper

This mattress will be “perfect” as soon as my back adjusts to the firmness. I do like the comfiness of the top layer and the mattress is supportive.

Review from Serta
Helpful?7JIQY3DE2VJ715235570013
Apr 2, 2026
Jill M
5 out of 5 stars review

Best Mattress Ever!

Firm, but not too firm, felt supported and blissful from the very first night...best sleep I've had in months!

Review from Serta
Helpful?7JIQY3DE2VJ715235570013
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 16, 2026
Joseph B
5 out of 5 stars review

First Night Restful

I typically take days to adjust to a new mattress. The first night was very relaxing.

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
Helpful?7JIQY3DE2VJ715235570013
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
Helpful?7JIQY3DE2VJ715235570013
May 3, 2026
Karen R
4 out of 5 stars review

New Mattress After 14 Years

Comfortable and Affordable

Review from Serta
Helpful?7JIQY3DE2VJ715235570013
Apr 19, 2026
Robert F
4 out of 5 stars review

Not light

So far seems cool im older and had to have help to move it

Review from Serta
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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
Helpful?7JIQY3DE2VJ715235570013