More comfortable than you imagine
This is a foam based mattress (think temper pedic) but -- and this is important -- you don't get lost in the mattress. The other mattress is so soft that you end up sinking and it makes it difficult to get out of without a struggle. This mattress doesn't have that problem. It's soft, but not so soft to sink you. The foam is comfortable and easily negotiated for me, which is great since I tend to move around a lot while sleeping (mostly to find a cool spot on the mattress!) And my cats don't shred it the way they shredded my coil mattress -- another plus! The one drawback is that the cover, while it says it's cooling -- didn't cool enough for me. All in all, I would certainly recommend this mattress.