I bought two for these beds for the grand kids when they want to have a sleep over in the family room. I got two twin size so they can be put together to make a large bed or two singles. They store better that way and they are very comfortable even for the adults when they talk mom and dad in to sleeping with them!! Very glad I bought them!!
I use this mattress on a wood platform in my camper. As long as you do not sleep on your side it is fairly comfortable, firm but acceptable. Sleeper who sleep on their side will find that it is not quite thick enough to support your hips. You can feel the wood platform. We added a 1-1/2" thick topper and this solved the side sleepeer problem.
This was advertised as 3 inches of high density foam with 1.75 inches of memory foam. It is actually 4 inches of very soft foam and very thin layer of memory foam (less than one quarter inch) glued on top. Falsely advertised. Returning it the day after receiving it.