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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 101-110 of 249 reviews
Sep 12, 2024
jordanjd
5 out of 5 stars
5 out of 5 stars review

Better sleep and comforting! Great for my back.

[This review was collected as part of a promotion.] This mattress has been a huge help to the quality of sleep that my wife & I get. Before we had a firm memory foam mattress & it was causing some morning discomfort for both of us. After receiving this mattress it took a week or so to break it in but we have both been sleeping so much better & having little to no discomfort in the mornings. I will say it’s a bit too stiff to sleep on your side with but other than that it’s a great mattress overall. Great material & quality which makes me hopeful it’ll last many years.

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Sep 15, 2024
ad116
5 out of 5 stars
5 out of 5 stars review

Great night sleep on this firm, pleasant cooling effect, high quality material and beautiful design pattern

[This review was collected as part of a promotion.] Great mattress! I was very excited to finally get a new mattress and I had such a great night of sleep after sleeping on this Serta one. My previous mattress was softer, and I had been waking up with some back pain, but this mattress is firm and helps a lot with my back and hips not sinking in as I sleep. It has a pleasant cooling effect so I didn’t feel overheated at night, and I love that it’s thicker as I like to sleep higher up off the ground since I am tall. It was such a shame to have to cover up the mattress with my bedding as I loved the design and dark blue and white color patterns. It also has helpful handles on the side so you can adjust it as needed on your bedframe. It’s on the heavier side, but most of my mattresses in the past have been heavy as well so I didn’t mind that. I prefer a heavier mattress, so it feels more sturdy when I am on the bed. I would definitely recommend this to anyone looking for a firmer high quality mattress!  

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Sep 28, 2024
victoriar367
5 out of 5 stars
5 out of 5 stars review

Comfortable

[This review was collected as part of a promotion.] ABSOLUTELY AMAZING! I can't believe I received a mattress, an extremely comfortable one at that! It adds so much to the room. The height is great & completes the room. The design on the mattress is very intricate. Good support, durability, and comfort. It's soft yet firm. Love this mattress!

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Dec 12, 2025
Debbie H
5 out of 5 stars
5 out of 5 stars review

Comfy!

Nice and firm, very comfortable and I do not want to get out of bed!!

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Sep 29, 2025
Normand G
5 out of 5 stars
5 out of 5 stars review

Comfort!!

Very comfortable mattress!

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Sep 28, 2025
Stephen m M
5 out of 5 stars
5 out of 5 stars review

Great mattress

Comfortable and supportive!

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Sep 12, 2025
Angel B
5 out of 5 stars
5 out of 5 stars review

Better than any mattress!

Bed is firm comfy…just the way we like it!

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Nov 22, 2025
Ronda S
5 out of 5 stars
5 out of 5 stars review

Firm and comfortable

Love new mattress. Side sleeper and it is not too firm to cause discomfort. Highly recommend.

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Sep 20, 2025
Pam C
5 out of 5 stars
5 out of 5 stars review

Extremely comfortable

This mattress is so comfortable. It gives to your body but also supportive.

Review from Serta
Helpful?1L02F9H4SZMK15251160390
Apr 2, 2025
Mel V
3 out of 5 stars
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?1L02F9H4SZMK15251160390