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Sam's Club
Customer reviews for Serta Perfect Sleeper X Knox Hybrid Mattress for
Serta Perfect Sleeper X Knox Hybrid Mattress
4.7 out of 5 stars
stars235 ratings235 reviews
  1. 5 stars80% (187)
  2. 4 stars15% (36)
  3. 3 stars3% (7)
  4. 2 stars0% (1)
  5. 1 star2% (4)

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Showing 41-50 of 235 reviews
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

Review from Serta
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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.

Review from Serta
Helpful?7JIQY3DE2VJ715231903459
Oct 13, 2025
Barbara E
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
Helpful?7JIQY3DE2VJ715231903459
Jan 10, 2026
Henry D
5 out of 5 stars review

So far only 2 nights in

So far so good. Went from queen to king. Plenty of room now for the 2 of us. Seems to be doing it's job.

Review from Serta
Helpful?7JIQY3DE2VJ715231903459
Jul 11, 2025
Carol L
5 out of 5 stars review

Love it

Once I lay down to sleep, I fall to sleep immediately and sleep the entire night. It is very comfortable and no aches or pains. I am totally happy and satisfied with it

Review from Serta
Helpful?7JIQY3DE2VJ715231903459
Jun 15, 2025
Adam C
4 out of 5 stars review

Great mattress

This mattress starts out firm at first but after a few nights sleep is very comfortable. I normally sleep on my back and it’s very supportive of them mid to low back and cradled your body!

Review from Serta
Helpful?7JIQY3DE2VJ715231903459
Aug 28, 2025
BETHS
5 out of 5 stars review

Perfect blend of support and comfort.

I’m a side sleeper and was looking for a firm mattress that would not make the pressure points in my shoulder and hips hurt. This hybrid mattress has been perfect for me!

Review from ashleyfurniture
Helpful?7JIQY3DE2VJ715231903459
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.

Review from Serta
Helpful?7JIQY3DE2VJ715231903459
Aug 14, 2025
Linda S
5 out of 5 stars review

So far so good

Having slept on our new Serta Perfect Sleeper X Hybrid Knox Plush Cal King for two nights has been wonderful. Supportive and comfortable for much needed good night sleep.

Review from Serta
Helpful?7JIQY3DE2VJ715231903459
Jul 4, 2025
Cheryl M
5 out of 5 stars review

Best Sleep I’ve Ever Had

Very firm but comfortably supports my spine after two surgeries. I go right to sleep without tossing and turning like I did with my previous mattress.

Review from Serta
Helpful?7JIQY3DE2VJ715231903459