This bed is not a King size mattress- it is too short in length and too short in width, now I have gaps all throughout my bed frame. I wish I would have looked at the bad reviews first. It took forever to arrive as well - there were so many bad instances when ordering and receiving this bed. DO NOT BUY

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.

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!

We bought two MM 14” medium-feel hybrid mattresses, and we could not be happier with our purchase. We sleep supported—without sinking in—and cool. And we rest for a minimum of 5-6 hours before awakening. Then it's back to sleep. These are the best mattresses we have ever owned, and they are competing against high-end, ripoff-priced mattresses that we owned previously and that cost $6,000 and $7,500 (specialty brands from San Francisco). If you need a mattress, don't delay. Members Mark will save the day.

If you buy the Ultra Plush, expect a SUPER SOFT mattress. In fact it is so soft, it feels like it is actually hurting rather than helping since there is virtually no support. We like a plush mattress but this is nuts. When you lie on it, and we are not big people, from the side you can only see 80% of us. Medium firm is probably the best. The other issue is sheets staying on. The cover is incredibly slick and the sheets slip off with ease. You will need a zip-on mattress cover that has some friction to keep the sheets from slipping off the corners. All it takes is getting in the bed and a corner will come off. We have the right sized, deep pocket sheets (from Sams). If your weight is in the 100 to 120 pound range, you may not sink like a rock. An average adult (I weigh 190), I am in a hole. This one is going to being returned.

The plush mattress is like sleeping on a marshmallow. You totally sink into it. No support whatsoever. And I like a softer mattress. But not this. Also, there is NO reason for it to be 14 inches thick. Making the bed is a nightmare and keeping some expensive deep pocket sheets on it is impossible. Have had the mattress on a guest bed just a few months. Will be putting on the curb for garbage pickup soon.

Hotel premier hybrid firm mattress. I purchased this mattress about 5 months ago and immediately noticed it was crooked the foam and coils didn't line up on some of the edges which resulted in one side of the mattress having no coils under the foam and caused it to gave way as soon as you sat on the edge. Husband already fell off the bed twice because of this, but the only reason we kept this long is because it took us so long to look for a mattress in the first place, we live 24 miles away from the store, and retuning it required us finding time and a vehicle big enough to transport back to the store. When you lie on the bed where all layers line up it is actually very comfortable which is why we found this so dissapointing going through the hassle of returning it and looking for a different mattress which we are still in the process of. If i could be garanteed this wouldn't happen again I would probably get it again since it was comfortable, but buying it and having to return it again if it comes out poorly assembled again is just not something I want to deal with.

This mattress does NOT hold ip. We purchased it in September and it is already broken down. It was much more plush than expected, as well. Save yourself the hassle and get a nicer one elsewhere. This one was great for the first few weeks and has two holes where we have slept for barely two months! The motion transfer is awful, as well. Such a disappointment. We are returning it for a full refund, it hasn’t even been 90 days.

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.

I've had this mattress for about six months now, and I'm a larger heavier guy. Every night of sleep on this bed has been great, it's just the right firmness, doesn't get to hot or to cold. So far there's been no loss or difference in firmness/comfort. Completely silent, and doesn't transmit motion when getting in or out of the bed. No real complaints to it, just make sure you have help carrying and unpacking it, it is very heavy.