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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
249 ratings249 reviews
  1. 5 stars79% (197)
  2. 4 stars15% (38)
  3. 3 stars3% (7)
  4. 2 stars1% (2)
  5. 1 star2% (5)

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Showing 61-70 of 249 reviews
Mar 6, 2026
Emily S
5 out of 5 stars
5 out of 5 stars review

Best option

very comfortable mattress, it’s the perfect option I was looking for

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Feb 20, 2026
Elaine M
5 out of 5 stars
5 out of 5 stars review

Comfortable nights rest

Supportive & just the right amount of softness

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Dec 21, 2025
Rita D
5 out of 5 stars
5 out of 5 stars review

Great support

Very firm! Exactly what was wanted and received!

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Jan 25, 2026
Linda S
5 out of 5 stars
5 out of 5 stars review

Perfect Sleeper

So so good! Very comfy and cozy and great for my back!

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Jun 29, 2026
Linda C
5 out of 5 stars
5 out of 5 stars review

Serta

Foundation too high.

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Jul 8, 2026
John O
5 out of 5 stars
5 out of 5 stars review

Great deal

Very very comfortable

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Apr 7, 2025
Dan24
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

Very comfortable.

I’m very happy with my new mattress. I’ve been using it for a few weeks now, and my body feels more rusted and less pain when waking up.

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Dec 13, 2025
Linda S
1 out of 5 stars
1 out of 5 stars review

Sink hole

When I first got this replacement, it was great, and now, for the last four months I’ve been dealing with a sink hole and is killing my lower back.

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Nov 19, 2024
Seventies young
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

We bought this matress about a month ago and have loved it. We are older and it has been very comfortable.

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Nov 23, 2024
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?1L02F9H4SZMK15251160390