At first I thought this was the most comfortable mattress ever. Then I had one delivered and snapped out of it. When you first lay on it, it's soft and comfortable. About an hour or so into your sleep, you discover you are in a hot gully. The memory foam holds the heat and if you sleep warm to begin with, as I am, this will drive you nuts. Also, since they use a lot of memory foam in this mattress, the off-gassing goes on for more than 2 weeks - and that's with fans going and windows open on a cool day. If any of this is a problem for you, move along. I swapped this out and got something else. It's a shame, too. Except for the glue spot on the side of the mattress (which at this price point should not have been there), it seemed like it was made well.