Alrighty so let me tell you a couple things before I get into this. I have purchased 3 of these with mixed results. I have two children, one of which had night accidents routinely and the other is autistic and hasn't figured out potty training and prefers to not wear a diaper.
The first two of these mattresses we ordered after trying out tons of mattress covers and similar items. Having purchased children's beds I wasn't surprised they were compressed. Those two rolled out and decompressed just fine. We had them both for over a year, daily and sometimes multiple times a day we had to clean these things of poop, pee, juice, crumbs, and other sticky stuff. Every time we were able to get it like new. Eventually one of them got a hole in it and eventually it was destroyed. For the $75 or whatever I paid, it was well worth it. I will add that although they're not my preferred type of mattress they were not uncomfortable.
We ordered another mattress to replace the destroyed one and it came vacuum sealed again but this one didn't puff up like the other ones. I figured I would give it some time but it still didn't expand. Someone told me that if they were stored cold they sometimes don't expand right and to hit it with a blow dryer. Reluctantly I tried and that helped it expand a bit more. I was disappointed to have to deal with that but otherwise these things have been amazing. If you're looking for the most comfortable mattress, this likely isn't it. If you're looking for durability, the ability to deal with night accidents, etc etc. stop looking, stop buying other crap just get one of these.

I purchased 3 of these 6" memory foam mattresses for a bunk bed set with a trundle. I was hesitant to purchase these after reading so many of the negative reviews, however, as with most every product, there will be negative and positive reviews.. I was pleasantly surprised when I unwrapped them from the compressed material they were shipped in! Almost immediately they began to fluff up and it was just a matter of minutes before I could see the 6", as described, memory foam come to life! I will still let them settle a couple days to fully expand, however, in my opinion, these were a great purchase for a fair price for what I have researched. I will add, I also bought 3 waterproof mattress covers to ensure these would last. I believe the mattress material itself is perhaps water resistant, but since my grandchildren ages 2, 4, and 7 will be sleeping on the mattresses when they come to visit me, I decided to take the extra step to purchase peace of mind! The waterproof mattress covers were only 10.89 ea. Well worth the price I believe. The mattresses did not come with a seperate mattress cover as the description may lead people to believe. I hope taking the time to write this review will help others to decide to make this purchase or not. Thanks to everyone who did take the time to write one, whether it was negative or positive. In final summary.... I am happy with my purchase!

Easy and sturdy. Appears to be comfortable for the kiddo.

bought to replace my daughters old bed. she absolutely loves it but she is very light. lol if you are a heavier person like me, it is a bit harder i think. but she is very very happy. it came vacuum sealed and easy to release on the bed. just let it sit for a couple hours to get full of air and ur good to go!

Really nice mattress and doesn't look cheap. I wouldn't recommend putting it on a metal bed frame though, it's very slick and falls off all the time lol.