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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?5QG9W3640AJR15213800559
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?5QG9W3640AJR15213800559
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?5QG9W3640AJR15213800559
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?5QG9W3640AJR15213800559
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?5QG9W3640AJR15213800559
Sep 12, 2024
Reviewer name: leaht59
5 out of 5 stars
5 out of 5 stars review

Comfortable, supportive mattress.

[This review was collected as part of a promotion.] This hybrid mattress is perfect for our guest room. It is comfortable, durable, and breathable. It is a firm mattress, but it doesn't feel too hard, and the support it provides is great.

Review from Serta
Helpful?5QG9W3640AJR15213800559
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?5QG9W3640AJR15213800559
Nov 3, 2024
Reviewer name: Connie D
5 out of 5 stars
5 out of 5 stars review

Finally; no pain

Was having severe back; hip and shoulder pain. Slept on another bed on vacation and realized I needed to get a new mattress!! It’s amazing how much better I feel!!

Review from Serta
Helpful?5QG9W3640AJR15213800559
Aug 24, 2024
Reviewer name: laurenv129
4 out of 5 stars
4 out of 5 stars review

Beautiful and Comfortable

[This review was collected as part of a promotion.] This durable mattress provides superior comfort and support while keeping maintenance at a minimum. The breathability is unmatched by the competition. Would recommend.

Review from Serta
Helpful?5QG9W3640AJR15213800559
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?5QG9W3640AJR15213800559