Read all the one star reviews and then read them again. This is not a good mattress, certainly not a luxury mattress. The size is not a true king size even though measurements are given. That means it doesn't fit a king frame nor will king sheets fit right. And it's not that comfortable. Good luck if you decide to buy it anyways.

I bought this in queen size a couple of months ago and I think it's great. A true medium firmness. I had bought the 13" eurotop members mark medium firmness hybrid before buying this mattress and it was stiff as a board and it held heat like a pure memory foam. I returned it after a couple of weeks. This mattress is very cool to sleep on as well as plush enough for a 240 pound side sleeper like me w/o being swallowed up by the mattress.

Not a good mattress felt great for about a month. I should've had red flags when the mattress arrived too short from my other twin xl and more narrow. Seems like this one was definitely defective maybe? Not wanting to keep it either because my deep sheets don't work on it as well!

Hesitantly bought this bc we couldn't lay on one before purchase but great mattress. Always had plush coil mattress before but wife and I love this mattress...especially for the cost. Would definitely recommend!

I know it's not a $2,000 mattress but it's such a piece of crap. we're going to be sending it back. you bounce all over on that bed and the sides of the bed are very weak. just junk but what do you expect for 600 bucks?

Don't waste your time on this mattress. We had two more delivered after the first one was faulty, the first replacement mattress being both the wrong size and the wrong model. Turns out both the first and the third were faulty. Neither expanded to the full 14" height after more than a week of inflate time, both were 70" instead of 75". The return/replacement process is a nightmare. A private shipping company, which was terrible to deal with, was dispatched to our house to collect the mattress. The first replacement mattress was a California King instead of a twin. Unfortunately, we did not figure this out until it had expanded partially on my child's bed and partially on the floor. When I spoke with someone about the issue, I was told that my child could sleep on the california king on the floor while we awaited the pickup and replacement of the extremely too large mattress. It was a true delight to try and get a fully expanded california king out of the room, down the stairs, and outside for the aforementioned terrible shipping company to come and pick it up. While awaiting the pickup and shipment of the appropriate size model my child was completely blocked out of her room by the mattress and forced to sleep elsewhere. After the third and final mattress arrived we set it up and let it sit for longer than the 3 recommended days. It is still just 12" high and 70" long. It does not come anywhere near filling the cover and no sheets will ever fit it. It will be going back. Both of my adult children have had great success with other Sams mattress models, but do not get this one.

The mattress is great. More of a medium firm, but plenty of give and bounce being a hybrid with foam vs latex. Will update if after a few weeks there are any issues. Ships from the same factory as nectar and the other popular hybrid mattresses. FedEx has yet to deliver a single Sam's club order by the original estimated date. Ever. I would like an option to choose a different shipper.

This is the 2nd time I have ordered a members mark twin xl mattress from Sam’s. The first time it was the 12” and this time it’s the 14”. Both times I received a mattress that was twin size not twin xl, contrary to what the box was marked as. I returned the 12” and now I will be returning this 14”. You cannot use a twin size comfortably on an adjustable split king bed or frame. It’s awful having the pillows falling behind the top of mattress all night. This mattress also has very little foam thickness on the springs, it’s only 4” thick on a 14” thick mattress. The mattress doesn’t even expand larger than 13”. I have enclosed photos of this. It’s so bad that the mattress cover is huge compared to the mattress. I enclosed photos of the length measurements along the top of the mattress and along the bottom of the mattress. Customer service states that the length is +-1” well this is 74” on the top and 77” on the spring side. I have 3” of space between the headboard and mattress with the bed set to flat and you can see in the photos that’s with the spring side up which is the longer of the sides, so compared to my husband’s side which is a foam mattress it’s a big difference. I don’t know what the other sizes of this mattress are like but the twin xl is awful. The springs are felt as the night goes on which I say is because of the lack of foam. This 14” also has less coils then then the 12” according to the product information for both mattresses. Save your money folks, this is not the bargain it seems.

Purchased the "firm" version of this mattress a couple of weeks ago. Slept on it for 5 days now. Very comfortable, and the cooling top is great! "Firm" = support and a little give. Definitely not a hard mattress. No harsh smells were noticeable when the mattress was unwrapped. The box was a little beat up but the mattress was not affected. I would purchase again. Melissa H.

Ordered the "medium" version first. We are going to return it and exchange for the plush. My wife is a side sleeper, and I am a back sleeper. So, we're trying to find the "middle ground" where we're both comfortable. I will update this review (or post a second review) once we get the Plush version in. That said, the bed is comfortable and seems to be well made. We've been on it about a month now, and while we do like it, the medium is just too firm. We're 5'7"/5'10", and ~130-170 lbs. Hoping the Plush version is softer. That said, I called Sam's club service number. They are having someone come pick up the mattress. This is great customer service. In the meantime, I have ordered the plush. I'm hoping for the best, but also I am purchasing confidently because of the great customer service I just received.