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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 131-140 of 264 reviews
Mar 16, 2026
Reviewer name: Lisa A
4 out of 5 stars
4 out of 5 stars review

Firm

Firm and supportive

Review from Serta
Helpful?5QG9W3640AJR15234813409
Mar 22, 2026
Reviewer name: Alexander M
5 out of 5 stars
5 out of 5 stars review

Excellent firm mattress

Very supportive

Review from Serta
Helpful?5QG9W3640AJR15234813409
Apr 6, 2026
Reviewer name: Marta Z
5 out of 5 stars
5 out of 5 stars review

Full size Mattress

Just unwrapped it.

Review from Serta
Helpful?5QG9W3640AJR15234813409
Mar 28, 2026
Reviewer name: Sarah A
5 out of 5 stars
5 out of 5 stars review

Ashley Furniture

Great firm mattress

Review from Serta
Helpful?5QG9W3640AJR15234813409
May 8, 2026
Reviewer name: Olsi G
5 out of 5 stars
5 out of 5 stars review

Nice

Nice mattress

Review from Serta
Helpful?5QG9W3640AJR15234813409
Feb 21, 2025
Reviewer name: Susan D
5 out of 5 stars
5 out of 5 stars review

Sleep heaven

This mattress is so comfortable! It's firm but not too firm. I added my own pillow top and it feels like sleeping on a cloud. I'm a back sleeper and feel like this mattress has improved my sleep quality.

Review from Serta
Helpful?5QG9W3640AJR15234813409
Oct 5, 2024
Reviewer name: beautyforumbyangela
5 out of 5 stars
5 out of 5 stars review

The perfect sleep night after night

[This review was collected as part of a promotion.] The Serta Perfect Sleeper Quilted Hybrid mattress will give you a perfect sleep night after night. It is made to be durable, breathable, comfortable and perfect for hot or cold sleepers.

Review from Serta
Helpful?5QG9W3640AJR15234813409
Jul 4, 2025
Reviewer name: Cheryl M
5 out of 5 stars
5 out of 5 stars review

Best Sleep I’ve Ever Had

Very firm but comfortably supports my spine after two surgeries. I go right to sleep without tossing and turning like I did with my previous mattress.

Review from Serta
Helpful?5QG9W3640AJR15234813409
Sep 18, 2025
Reviewer name: Ronald W
5 out of 5 stars
5 out of 5 stars review

Straight No Chaser, Comfort Sleep!!

This mattress is, “da’ bomb!” Folks, if you think I’m fibbin’, get one! It seems to re-align sleeping posture, I miss work, on purpose to stay on this mattress! I removed the bedding to get model number for warranty- 10 years limited.

Review from Serta
Helpful?5QG9W3640AJR15234813409
Oct 26, 2024
Reviewer name: elgal
5 out of 5 stars
5 out of 5 stars review

Great quality!

[This review was collected as part of a promotion.] This mattress is super comfortable and gives us all the support we need, have seen a difference waking up with less body ache and strained back muscles.

Review from Serta
Helpful?5QG9W3640AJR15234813409