12" Cooling Gel Memory Foam Mattress - Medium Firm Twin XL Size, CertiPUR-US Certified for Pressure Relief & Support | Perfect for Guest Rooms, Dorms & Small Spaces

To clear up a lot of confusion with this mattress, here is an Honest to God review....Summary:- Mattress was easy to assemble (cut package and roll/air out)- Smell was not that bad... It's expected, so have a fan ready and air it out.- Firm version of memory foam (Perfect for bigger guys like me) But I have a hunch it breaks in over time.- Quality seemed very nice.I just received this mattress yesterday ( 8/5/2015 ). The packaging was as expected, the Cardboard box was in rough shape but the heavy duty plastic on the inside was untouched. I'm a 6'2" 230lb athletic man that spends most of my free time in the gym, so getting the package onto my bed frame by myself was no problem at all. To a regular or smaller person, you might need an extra hand carrying the 90+lb package.Upon opening, I cut the plastic and everything went as expected. The mattress inflated itself within 30 minutes with the corners lagging behind (I just hit the corners with my hand to fluff them up and help them catch up) . I let it sit for 24 hours before laying on it. The smell is strong, but it's not as bad as people make it out to be. Looking at the other reviews, some of these people must have had a bad mattress, or simply can't take a little odor for a few days (they might be sensitive).Here's the biggest point... The mattress is a very firm version of memory foam. Right out of the box the mattress doesn't give in as much as you may think. It's perfect for someone like me because, like I've said, I'm 230 lbs and athletic. This thing offers the perfect support for me, giving in to my heavy points and supporting my lighter areas yet I can see somebody who's much lighter having issues. I say to those people, give the mattress time to break in. I'll update this in a few months with a follow up.Tonight will be the first night I sleep on it, and I couldn't be more excited. The 10 minutes I spend laying on it this morning almost made me fall right asleep again. I'll keep this post updated because there seems to be a lot of confusion on this mattress.* Off topic *The first one I ordered got mixed up in the mail due to the carrier, therefor I got my mattress 3 days late. Amazon's customer service was perfect and I couldn't have asked for a better crew to solve the problem.** UPDATE (08/07/2015) **- Last night was the first night that I slept on the mattress and I can honestly say I had a great night sleep. I didn't wake up in the middle of the night at all. I was cool all night (Granted I had a 17" box fan blowing directly over me) and the only time I got hot was when my lady friend came over earlier. I'm usually a very hot sleeper and people who complain about the heat of this thing should invest in a fan. Even without the fan it was very cool at first, but it did start warming up slightly after 30 minutes or so of laying in the same spot - but it wasn't that bad.I can say that I'm very pleased with my first night on this thing.*** UPDATE 08/24/2015Sleeping on this thing has been a pleasure. It's not revolutionizing, but it's much more comfortable than my last mattress. The smell is pretty much gone although it did take awhile. The smell was honestly not that bad and the only way you could really smell it was if you stuck your nose in the mattress. I don't wake up in the middle of the night anymore from tossing and turning. That's a huge plus for me because on my old mattress It felt like I had a cycle of waking up at 3 or 4am from tossing and turning. The mattress is still very firm, but like I said before, it's perfect for me because I'm big and heavy enough to actually sink in a bit.