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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 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?5QG9W3640AJR15258655098
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?5QG9W3640AJR15258655098
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?5QG9W3640AJR15258655098
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?5QG9W3640AJR15258655098
May 8, 2026
Reviewer name: Olsi G
5 out of 5 stars
5 out of 5 stars review

Nice

Nice mattress

Review from Serta
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Jul 11, 2025
Reviewer name: Carol L
5 out of 5 stars
5 out of 5 stars review

Love it

Once I lay down to sleep, I fall to sleep immediately and sleep the entire night. It is very comfortable and no aches or pains. I am totally happy and satisfied with it

Review from Serta
Helpful?5QG9W3640AJR15258655098
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
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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?5QG9W3640AJR15258655098
Oct 21, 2024
Reviewer name: ksr_official95
4 out of 5 stars
4 out of 5 stars review

High quality good performance

[This review was collected as part of a promotion.] This Matress has been really good with my back. It's comfortable and you get good sleep at night. The hybrid technology keeps my body cool and it's nice to feel firmness along with comfort.

Review from Serta
Helpful?5QG9W3640AJR15258655098
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?5QG9W3640AJR15258655098