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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 71-80 of 249 reviews
Jun 29, 2026
Linda C
5 out of 5 stars
5 out of 5 stars review

Serta

Foundation too high.

Review from Serta
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Jul 8, 2026
John O
5 out of 5 stars
5 out of 5 stars review

Great deal

Very very comfortable

Review from Serta
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Sep 19, 2025
Debbe H
5 out of 5 stars
5 out of 5 stars review

Saved my back

I have a lot of health issues with my back and haven’t been able to find a mattress that is comfortable until now. Thank you so much.

Review from Serta
Helpful?1L02F9H4SZMK15258655880
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?1L02F9H4SZMK15258655880
Nov 23, 2025
Francis M
5 out of 5 stars
5 out of 5 stars review

Good Mattress

My new Serta mattress is great! I’am sleeping much better now that I have my new mattress! I recommend Serta mattresses.

Review from Serta
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Oct 13, 2025
Barbara E
3 out of 5 stars
3 out of 5 stars review

Adjustable bed

I like the bed but unhappy that I cannot use my head board and it is difficult to keep the top sheet secured.

Review from Serta
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May 8, 2026
Olsi G
5 out of 5 stars
5 out of 5 stars review

Nice

Nice mattress

Review from Serta
Helpful?1L02F9H4SZMK15258655880
Sep 3, 2024
elenag92
5 out of 5 stars
5 out of 5 stars review

It offers everything I need

[This review was collected as part of a promotion.] This mattress strikes the perfect balance between firmness and softness. The hybrid design combines the support of coils with the plush comfort of memory foam. It’s firm enough to provide excellent support for my back, which is crucial after long days of household chores, yet soft enough to feel like I’m sinking into a cloud every night. One of my biggest concerns with mattresses has always been overheating during the night, but the Perfect Sleeper has really impressed me. The quilted top layer seems to do a great job of regulating temperature, keeping me cool. The build quality of this mattress is outstanding. It feels sturdy and well-made, and after several weeks of use, there’s no sign of sagging or wear. I believe this mattress will last for many years, which is a relief because I definitely don’t want to go through the hassle of mattress shopping again anytime soon! One unexpected bonus is the excellent edge support. I can sit on the edge of the bed without feeling like I’m going to slide off, which is great for those moments when I need to slip out of bed quietly without waking anyone else. Overall, it has been a wonderful addition to our home. It offers everything I need in a mattress: comfort, support, durability, and a cool sleeping experience

Review from Serta
Helpful?1L02F9H4SZMK15258655880
Nov 21, 2024
kaifou_199126
5 out of 5 stars
5 out of 5 stars review

Have you ever wanted your bed to give you a hug?

[This review was collected as part of a promotion.] This bed was put into our guest room and it might be more comfortable than my bed. With the right mattress protector, the mattress is surprisingly cooling and cozy in both hot and cold weather! The mattress has the perfect balance of plushness and support for your body. I would recommend to anyone looking for a new mattress.

Review from Serta
Helpful?1L02F9H4SZMK15258655880
Nov 19, 2024
issacl1_336065
5 out of 5 stars
5 out of 5 stars review

Sturdy, yet soft like a pillow.

[This review was collected as part of a promotion.] The bed is incredibly comfortable. The top is soft like a pillow, but the whole mattress feels firm. The pattern on it is cool but doesn't really add anything to the performance of it. This is a perfect choice for back sleepers or those who sleep on their stomach. Amazing product with an amazing quality feel to it.

Review from Serta
Helpful?1L02F9H4SZMK15258655880