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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
stars229 ratings229 reviews
  1. 5 stars79% (181)
  2. 4 stars16% (36)
  3. 3 stars3% (7)
  4. 2 stars0% (1)
  5. 1 star2% (4)

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Showing 11-20 of 229 reviews
Nov 19, 2024
Seventies young
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.

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Apr 19, 2025
CA2025
5 out of 5 stars review

Verified Purchase

GREAT MATRESS !!

Perfect firmness for both my wife and my needs. Slept like I didn't have kids waking me up every few hours again.

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Nov 23, 2024
Holli
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
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Apr 7, 2025
Dan24
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.

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Mar 6, 2026
Denise H
1 out of 5 stars review

Not great so far

I ordered a plush but it feels very firm to me so far. I haven't had it very long so I am going to keep trying for a while longer and hope it gets better. Back pain is worse with this mattress so far.

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Mar 21, 2026
Cari T
4 out of 5 stars review

Perfect Sleeper

This mattress will be “perfect” as soon as my back adjusts to the firmness. I do like the comfiness of the top layer and the mattress is supportive.

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Apr 2, 2026
Jill M
5 out of 5 stars review

Best Mattress Ever!

Firm, but not too firm, felt supported and blissful from the very first night...best sleep I've had in months!

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Sep 18, 2025
Ronald W
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.

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Dec 21, 2025
Jasmin M
5 out of 5 stars review

Serta Perfect Sleeper

So far so good. I do like it better than my previous mattress which was more of a soft pillow top firm plush mattress. It was too soft and my back would hurt a lot. So I'm hoping this firm sleeper will do wonders but so far it feels great

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Nov 1, 2025
Kathleen M
5 out of 5 stars review

New firm mattress

My rest test told me I needed more lumbar support with my arthritis. Been 12 years since we had a new mattress. It was time. Very tall though so have deep pocket sheets on hand. Glad I have bed steps.

Review from Serta
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