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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 31-40 of 229 reviews
Apr 2, 2025
Mel V
3 out of 5 stars review

Verified Purchase

Firm

Don't have any issues with the bed or service. Customers should know this bed is very firm.

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Feb 25, 2026
Allan C
5 out of 5 stars review

Great support and comfort for us side sleepers

So far our decision to replace our old Serta Icomfort Applause II was a good one. Very supportive, and provides a better night's sleep.

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Apr 12, 2026
Marc G
4 out of 5 stars review

Comfortable

Comfy mattress, I don't like the blue floral color fabric, only draw back.

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Mar 27, 2026
Trent W
5 out of 5 stars review

Nice mattress

Firm but not extra firm with some top foam. It's nice!

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Mar 21, 2026
Wayne W
5 out of 5 stars review

Excellent mattress

We like the mattress very much

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Apr 14, 2026
Bill H
5 out of 5 stars review

Knox firm

A few days in. So far so good. Needed firm mattress. Waking up without pain

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Nov 23, 2025
Francis M
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.

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Dec 13, 2025
Linda S
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.

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Dec 25, 2025
Gloria S
5 out of 5 stars review

serta perfect sleeper x Knox 13.5

The mattress is super firm and comfortable. I am happy. I recommend for people who have joint bone problems and especially the back

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Sep 19, 2025
Debbe H
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
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