Bought for my sons bunk bed. It expanded nicely and is a nice semi firm bed. Does not sink on edges like other, thinner bunk bed mattresses. I fall asleep reading to my son often enough and usually prefer a softer bed, but thought it was good for my back...as long as you are a front or back sleeper. I’m also a side sleeper and I find it too firm for that. But I bought it for my 4 yo and he sleeps just fine on it. I think it’s a nice quality mattress thus far.