Skip to Main Content
Sam's Club
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
stars237 ratings237 reviews
  1. 5 stars79% (188)
  2. 4 stars16% (37)
  3. 3 stars3% (7)
  4. 2 stars0% (1)
  5. 1 star2% (4)

Member photos

Sort by |
Showing 21-30 of 237 reviews
Oct 31, 2025
Valerie M
5 out of 5 stars review

Best mattress ever!

Comfy, supportive, firm edges. I returned a Casper mattress and got this Perfect Sleeper X. Back pain gone after first night and I sleep through the entire night now!

Review from Serta
Helpful?7JIQY3DE2VJ715235570013
Jun 26, 2025
Eric T
5 out of 5 stars review

Great mattress - beautiful, well designed, and very comfortable

Love this mattress. Beautiful design and very comfortable. It has good support and a lovely cushioned top. Independent coil design with five comfort points is ingenious. We looked at every other brand, and this mattress was by far the best-designed and most competitively priced one we could find. Highly recommended.

Review from Serta
Helpful?7JIQY3DE2VJ715235570013
Mar 8, 2026
dimpelss
5 out of 5 stars review

Get it

I waited to write my review. We've own our mattresses maybe a mo now and it's broken in to my liking perhaps not all the way though. Off hand it was a lil firmer than i would like. I got the plush and the other is the firm both in twin xl's. Ours is paired with an adjustable base in zero clearance status and king size bed. I have moments where i can't wait to get in bed. I thought with my ailments it would help a lil more but mine are mechanical. No matter what i choose the ailments will still be there. When i can sleep it's comfortable. I first tried this in the mattress store along with the kendall model which is just flat and more contouring because of the memory foam. However that model made it harder for me to get up although i loved everything else about it. I got a great deal with the sale price of $799 for each one plus $300 back in gc form which i received appox a wk or so after delivery. I knew what i was getting and didn't go in blind when purchasing. Although i use it with my base there are no dips or anything forming in the mattress. I wish it longevity of 12 yrs as my king koil mattress. It's worth the spend.

Helpful?7JIQY3DE2VJ715235570013
May 21, 2026
Kari C
5 out of 5 stars review

Comfy

Mattress is comfy and supportive. If you like a firm mattress - this is the one for you.

Review from Serta
Helpful?7JIQY3DE2VJ715235570013
May 28, 2026
Eleanor W
5 out of 5 stars review

New Mattress

It was comfortable in the store - we will see how it is at home

Review from Serta
Helpful?7JIQY3DE2VJ715235570013
May 19, 2026
Anne R
5 out of 5 stars review

New Comfy Mattress

Love it! It is so comforting and relaxing…with lots of support!

Review from Serta
Helpful?7JIQY3DE2VJ715235570013
May 14, 2026
Subhashkumar P
4 out of 5 stars review

Really great I enjoyed it

Great of restful sleep. Nice o can sleep on relax

Review from Serta
Helpful?7JIQY3DE2VJ715235570013
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.

Review from Serta
Helpful?7JIQY3DE2VJ715235570013
May 28, 2026
Kim S
5 out of 5 stars review

Supportive

Comfy and makes a pretty bed

Review from Serta
Helpful?7JIQY3DE2VJ715235570013
Feb 1, 2025
Emankcin
5 out of 5 stars review

Verified Purchase

Very comfortable mattress for me. Firm but not too firm. No more back ache.

Review from Serta
Helpful?7JIQY3DE2VJ715235570013