Bought roughly 6 months ago, full FIRM mattress. Allowed this to "inflate" for 72 hours before sleeping on it. I am 5'6" roughly 200 lbs and tend to sleep on my stomach and back. I rotate the mattress every 4-6 weeks. Measures at roughly 13-13.5 inches after the 72 hr period which I consider close enough to the description. Initially felt it was too soft for me, however I think it matches the "firm" description when compared to other hybrid/memory foam mattresses. So far I don't have an indention where I sleep, but I do think the regular rotation is making a difference there. I would certainly buy this again; I have recommended it to my friends since buying. Only gave 4 stars because it does get a bit warm as the night goes on which again may be par for the course when it comes to memory foam mattresses.

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.

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!

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.

Highly recommend for anyone who has never bought a new mattress and is on a budget. We did not want to spend over $1000. I did some research and tried a mattress that we did not see or lay on in person. The reviews did not lie. It is so comfortable. Definitely feels like the higher end hotel beds we have slept on. It arrives in a box. We took it out of the box and placed it on the bed before unwrapping the package. Let it sit for a good 6-8 hours then we slept on it that night. It is a good firmness. Not too hard and not smushy. It is great. My husband overslept after the second night and said it was my fault for buying such a comfortable mattress. I'll take that as a good thing.

Where do I even begin with the Member's Mark Hotel Premier 14" Hybrid Mattress? Let me start by saying the word "Premier" is doing some very heavy lifting in that product name — unlike the mattress itself, which can't even support a small child without swallowing them whole like some kind of foam-padded Venus flytrap. I've slept on air mattresses at 2 a.m. after Thanksgiving dinner that offered more structural integrity than this thing. Calling it a "hybrid" is generous — it's a hybrid of disappointment and regret. Fourteen inches of mattress and somehow every single one of them is useless. My kid sits on it and practically disappears into the abyss like it's a memory foam black hole. The only thing this mattress is firm enough to support is my growing resentment toward Sam's Club. Speaking of which — let's talk about that famous "Satisfaction Guarantee." You know, the one proudly plastered across their website and membership materials? Turns out it comes with a silent asterisk that reads: unless it's this mattress, in which case, good luck and may God have mercy on your spine. I tried to return it and was met with more resistance than the mattress has ever provided my back. Apparently "100% Satisfaction Guarantee" is more of a vibe than an actual policy. So here I am, stuck with a $400 slab of lies, sleeping like I'm suspended over a pit of marshmallows, wondering what I did to deserve this. If you're looking for a mattress that functions as a mattress, keep scrolling. If you're looking for an oversized, overpriced dog bed that will also teach you a valuable lesson about reading the fine print — this is your guy. Would not recommend to my worst enemy. Would recommend to my neighbor who keeps parking in my spot.

We bought two twins a couple weeks ago (firm for husband and medium for me) for our king size platform. I really couldn't be happier, and my husband likes his, too. We both slept better immediately. Less tossing and turning from him, and I wake up in the same position I fall asleep in, with no extra stiffness/soreness. My only complaint is that when we measured (twice!), the twin x 2 was the correct size according to the chart, but now that they are here, unwrapped, and inflated, maybe the twin XLs would have fit a little better length-wise? Not a big deal for us, though...the foot of the bed is covered in sheets/blankets anyway, so it's not worth time or effort to exchange over a couple inches...but this is just a heads up for others who have different taste in firmness levels and want to try doing the same. Wait for the occasional $50 off and splurge. I think these mattresses are definitely worth it!

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.

DREAMY! We purchased two more expensive mattress only to return for these. We are not fans of memory foam and this is a true hybrid. We choose a king split - (2) twin XL, one plush and one medium. Heavenly! The plush is very soft and the medium is on the softer side as well. Personally, I do not feel the “cooling” aspect, but they are not hot like most memory foam. Fluffed up in a couple hours and slept on them same day. Hopefully they will hold up overtime, but you cant beat the price! Highly recommend!

When we set it up it felt like we were laying on something hard, so I unzipped the cover only to find that they had put the mattress in upside down, and we were laying on the coils. I hope that's not what they do for all mattresses. We flipped it over, and rezipped it, and initially it felt comfortable, but by 2nd & 3rd day my lower back was killing me. We will be returning this. I would not recommend to anyone that could suffer back pain.