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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 211-220 of 264 reviews
Oct 15, 2025
Reviewer name: Teresa H
3 out of 5 stars
3 out of 5 stars review

Disappointing

Already showing body imprints. Not really "cool" sleeping. It's just ok.

Review from Serta
Helpful?5QG9W3640AJR15240352414
Nov 2, 2025
Reviewer name: Linda S
5 out of 5 stars
5 out of 5 stars review

Great

Thanks for the quality product and 10 year quality assurances.

Review from Serta
Helpful?5QG9W3640AJR15240352414
Jan 9, 2025
Reviewer name: Joanna W
5 out of 5 stars
5 out of 5 stars review

New Serta Mattress

Comfy and supportive - looking forward to many restful sleep nights.

Review from Serta
Helpful?5QG9W3640AJR15240352414
May 9, 2025
Reviewer name: Takyi C
4 out of 5 stars
4 out of 5 stars review

Comfy and supportive mattress

Comfy and supportive mattress 👍

Review from Serta
Helpful?5QG9W3640AJR15240352414
Mar 27, 2025
Reviewer name: Sarah U
1 out of 5 stars
1 out of 5 stars review

Impressions permanent in less than two weeks

The mattress already has divots or impressions from where we sleep in less than two weeks. We are not overweight.

Review from Serta
Helpful?5QG9W3640AJR15240352414
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?5QG9W3640AJR15240352414
Jan 15, 2025
Reviewer name: Patrick L
5 out of 5 stars
5 out of 5 stars review

Great

So comfortable love it

Review from Serta
Helpful?5QG9W3640AJR15240352414
Jan 3, 2025
Reviewer name: Luis G
5 out of 5 stars
5 out of 5 stars review

Amazing comfort

What a nice mattress

Review from Serta
Helpful?5QG9W3640AJR15240352414
Nov 23, 2024
Reviewer name: Holli
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Great mattress

This mattress is amazing and a life saver. I did expect it to be more plush but it's still very comfortable. I sleep great now!

Review from Serta
Helpful?5QG9W3640AJR15240352414
Jun 15, 2025
Reviewer name: Adam C
4 out of 5 stars
4 out of 5 stars review

Great mattress

This mattress starts out firm at first but after a few nights sleep is very comfortable. I normally sleep on my back and it’s very supportive of them mid to low back and cradled your body!

Review from Serta
Helpful?5QG9W3640AJR15240352414