I purchased 2 Twin XL 12" medium mattresses to use with a King platform bed. While the mattresses expanded quickly, had no smell, and a perfect medium feel (not too soft/not too firm), they are not anywhere close to a Twin XL dimensions (38" x 80"). Within 15 minutes of unboxing, they each expanded to nearly 42" wide. Height only got to about 11" as well. 84" wide will not work on a 76 1/2" wide bed. I ordered online so they will be picked up, but it was a complete pain to have to plastic them up again for pick up.

The manufacturing chemical smell has not gone away after letting this mattress air out with the windows open and no cover on it for 48 hours. With a waterproof cover, mattress pad, sheets and comforter, the room still smells and my hair even smells like the chemicals after sleeping in it. It's a decent mattress otherwise although you will slide off if you try to sit on the edge of it. It's very soft.

After getting an adjustable frame decided time to change mattress. Biggest problem was getting the old one off and ready for disposal and getting the plastic off the mattress was bit of challenge being careful not to cut the mattress. Once in place it began to hiss and start to expand quickly. Was surprised it only took a few hours to expand to 11 of its 12 inches! Very comfortable. Have seen reviews saying too soft but they must like sleeping on a rock as this is advertised as medium firm and would say that is right. So far so good and if run into problems in the future will come back to amend. So far very pleased.

It starts with the unpacking. You will have to unwind layer upon layer upon layer of plastic - just great for the environment. First time I sat at the edge of the mattress I completely sank into it and my legs disappeared in the foam - I am only weighing 170 lb, mind you! Then I tried sitting at the top of the mattress, a large foam cushion behind my back, making me sit up straight for reading - I looked at my feet up in the air, because once again my buttocks sank into this supposedly medium firm sea of foam. I know I am supposed to sleep on this thing, but even stretching out on this soft foam you have to watch out not to suffocate because once again you are going under! the description says only the first layer is soft, well this thing is soft all the way to the bottom of it. Quite frankly, never have seen or laid upon such a piece of junk 'mattress' in my life, and I have slept on many. This thing is going back right away!

2 months after purchasing this mattress it began to sag in the middle. 2 people sleeping in this bed wind up laying up against each other in the center of the mattress. THEN - since I can't read "fine" print - SAMS CLUB will not allow me to return the mattress because I threw away the box. THEY REQUIRE YOU TO BRING IT IN FOR THEIR 100% MONEY BACK GUARANTEE WITH THE ORIGINAL BOX. I am so disappointed in the mattress and SAMS CLUB. WHO KEEPS A BIG BOX STORED JUST EXPECTING A TRUSTED STORE LIKE SAMS WOULD SELL THEM SOMETHING CRAPPY THAT THEY WOULD NEED TO RETURN IN THE FIRST PLACE.

I was in a financial and time crunch. I recently moved and had to purchase a matress quickly. Admittedly, I turned my nose up, assuming the store brand would not be comparable to the major matress brands. Bae-be was I wrong, wrong-wrong. This bed is firm like I like and applies the perfect amount of pressure to my lower back.

Mattress is far too soft you will end up with severe neck pains. The mattress has completely compressed and now I am experiencing both neck and back pains. This all even though I didn't sit or sleep on it for 72 hrs. after opening. This scenario is absolutely absurd and very disappointing

Worked in a jam. Picked up a mattress on the cheap after ours was ripped my movers. I also picked up 2 twin xl for 2 of my kids after they got new beds. I shoukd have known better for our adult bed. It was comfortable for a little over a year, then had noticeable dips and sag in the top layer. My partner and I both weigh between 140-150, so we aren't overly large people. Rotating the mattress didn't help prevent the sag. After 1.5 years my back couldn't take it anymore, and this mattress had to go. I'm also noticing a bit of sag in the 8 year old's mattress. She's under 100lbs AND doesn't live with us/sleep here full time. The top layer just doesn't hold up. No issues on the mattress for the 4yr old but... she's 4. Same thing there - that she doesn't sleep over at our place every night. Wishing I had just gotten innerspring mattresses for the kids, and gone back to our original mattress (Tuft and Needle) from the get go.

astronomical mattresses. Definitely choose this one over the new hybrid one. My entire household has these in all sizes. I bought my first one about 5 years ago and it hasn't had any impressions or imperfections. highly recommended. It has significantly reduced my lower back and hip pains. even the dogs love it

I am experiencing lower back pain when I wake up in the morning. I will not get another mattress with memory foam again. I’m looking for a bed topper that is firm to try and even it out. So disappointed by the description and positive reviews. I would rather sleep on the couch (Which is what I’m doing now) or have my old 20 plus year old mattress back.