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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 11-20 of 249 reviews
Apr 18, 2026
Xenia D
5 out of 5 stars
5 out of 5 stars review

Just right

I was unsure about ordering a comforter online that I didn't get to test first. Luckily it worked out providing the support and softness that I wanted.

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Jun 17, 2026
Amy H
2 out of 5 stars
2 out of 5 stars review

Hurts my back

Something hurts mid back. Trying to sleep a little lower so the hips are in one of the softer zones but not happy so far.

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Mar 6, 2026
Denise H
1 out of 5 stars
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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Dec 21, 2025
Jasmin M
5 out of 5 stars
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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Apr 4, 2026
Linda F
5 out of 5 stars
5 out of 5 stars review

Had a full nites sleep!

Wanted firm. Got firm. Kept firm didnt sink in... I slept 12 hours straight instead of adjusting & waking up every 2 hours and woke up with zero aches & pains! Its night #4... im hoping it will last days weeks months & years to come ?

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Mar 25, 2025
DrJLD
5 out of 5 stars
5 out of 5 stars review

Verified Purchase

A Perfect Balance of Comfort and Support!

We absolutely love our Serta mattress! At first, it felt a bit stiff, but after a few days of breaking it in, it became incredibly comfortable. We made the switch from our previous pillow top options because they kept breaking down too quickly, and we're so pleased with our decision. This mattress provides great support and feels much more durable. Overall, we couldn’t be happier with our purchase!

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Jul 24, 2026
Tom M
5 out of 5 stars
5 out of 5 stars review

Knox plush

So far it has been great, had less than a week.

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May 16, 2026
Cheryl P
5 out of 5 stars
5 out of 5 stars review

Commmmfortable

I have no complaints it's super comfortable. I never thought i'd like a mattress other than my king koil.

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May 29, 2026
Daetrell L
5 out of 5 stars
5 out of 5 stars review

New mattress.

Mattress is very comfortable and price worthy. I do heavy construction for a living so my body is saying thank you.

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Jun 14, 2026
Paul G
5 out of 5 stars
5 out of 5 stars review

Mattress

Firm the way, I like it and very comfortable

Review from Serta
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