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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
264 ratings264 reviews
  1. 5 stars79% (208)
  2. 4 stars15% (40)
  3. 3 stars3% (9)
  4. 2 stars1% (2)
  5. 1 star2% (5)
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Showing 201-210 of 264 reviews
Sep 28, 2025
Reviewer name: Stephen m M
5 out of 5 stars
5 out of 5 stars review

Great mattress

Comfortable and supportive!

Review from Serta
Helpful?5QG9W3640AJR15251010817
Jan 8, 2025
Reviewer name: Carolee R
4 out of 5 stars
4 out of 5 stars review

So far, so good

Sleep quality has improved

Review from Serta
Helpful?5QG9W3640AJR15251010817
Aug 8, 2025
Reviewer name: Deborah F
5 out of 5 stars
5 out of 5 stars review

Serta Knox Firm Mattress

This mattress is very firm & comfortable mattress.

Review from Serta
Helpful?5QG9W3640AJR15251010817
Jun 15, 2025
Reviewer name: James W
3 out of 5 stars
3 out of 5 stars review

Comfortable Sleep

Very firm. Looking forward to comfortable sleep.

Review from Serta
Helpful?5QG9W3640AJR15251010817
Oct 3, 2025
Reviewer name: Alin K
4 out of 5 stars
4 out of 5 stars review

So far so good!

I've only slept on my new mattress five nights and I really like it already.

Review from Serta
Helpful?5QG9W3640AJR15251010817
Aug 31, 2025
Reviewer name: Sharron A
5 out of 5 stars
5 out of 5 stars review

Good quality

Nice mattress good support

Review from Serta
Helpful?5QG9W3640AJR15251010817
May 14, 2025
Reviewer name: James K
5 out of 5 stars
5 out of 5 stars review

New mattress and box spring

Seems to be a great mattress

Review from Serta
Helpful?5QG9W3640AJR15251010817
Mar 21, 2025
Reviewer name: Susan F
5 out of 5 stars
5 out of 5 stars review

Finally the support I needed

Comfortable adjustment makes sleep a dream😊

Review from Serta
Helpful?5QG9W3640AJR15251010817
Jun 5, 2025
Reviewer name: Erika P
5 out of 5 stars
5 out of 5 stars review

Excellent Mattress

So very comfortable and cool!

Review from Serta
Helpful?5QG9W3640AJR15251010817
Sep 20, 2025
Reviewer name: Pam C
5 out of 5 stars
5 out of 5 stars review

Extremely comfortable

This mattress is so comfortable. It gives to your body but also supportive.

Review from Serta
Helpful?5QG9W3640AJR15251010817