UPDATE:  This mattress is in my AirBnB and everyone comments that it is very comfortable. I have used it three seasons, starting the fourth. The corner is still smooshed (never expanded) but I doesn't seem to effect it's use. Okay, I’m used to high quality mattresses.  This is not one of them.  Bought for my rental Airbnb, thinking I would give guests a nice comfy sleep.. this is VERY SOFT, super squishy cheap feeling foam - nothing like high density memory foam or a standard euro top.  There is not even foam wrapping the sides!  If you touch the side you feel metal springs under the cheap poly fabric.  I would never buy this again it is basically junk.