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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 31-40 of 249 reviews
Nov 1, 2025
Kathleen M
5 out of 5 stars
5 out of 5 stars review

New firm mattress

My rest test told me I needed more lumbar support with my arthritis. Been 12 years since we had a new mattress. It was time. Very tall though so have deep pocket sheets on hand. Glad I have bed steps.

Review from Serta
Helpful?1L02F9H4SZMK15234813404
Jan 1, 2025
CaseyAZ
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Supportive mattresse

Have been sleeping on the mattress for about 3 weeks. Me and my partner like different firmnesses. I am a side sleepersnd they are side and back sleeper. We got the medium firm with a pillow top and it comfortable for both of us. JE

Review from Serta
Helpful?1L02F9H4SZMK15234813404
Apr 28, 2026
Shannon C
4 out of 5 stars
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?1L02F9H4SZMK15234813404
Apr 27, 2026
Arturo R
5 out of 5 stars
5 out of 5 stars review

comfortable

excellent mattress very comfortable firm and soft

Review from Serta
Helpful?1L02F9H4SZMK15234813404
Apr 14, 2026
Bill H
5 out of 5 stars
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
Helpful?1L02F9H4SZMK15234813404
May 19, 2026
Anne R
5 out of 5 stars
5 out of 5 stars review

New Comfy Mattress

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

Review from Serta
Helpful?1L02F9H4SZMK15234813404
May 28, 2026
Eleanor W
5 out of 5 stars
5 out of 5 stars review

New Mattress

It was comfortable in the store - we will see how it is at home

Review from Serta
Helpful?1L02F9H4SZMK15234813404
Apr 16, 2026
Joseph B
5 out of 5 stars
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
Helpful?1L02F9H4SZMK15234813404
May 28, 2026
Kim S
5 out of 5 stars
5 out of 5 stars review

Supportive

Comfy and makes a pretty bed

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

New Mattress After 14 Years

Comfortable and Affordable

Review from Serta
Helpful?1L02F9H4SZMK15234813404