I've bought several mattresses online and been disappointed but finally we struck gold. The edge support is much better than others I've tried, and the mattress is a nice 'medium' that is definitely not too soft and offers good support, without feeling hard. No sagging in the middle. Seems to breathe well (though it's currently winter and we sleep cool). Husband is also very pleased. I like that it's lower profile than the giant 14" thick one we ditched. As it turns out, more does not equal better (more thickness or more money - we paid more for our last mattress and I hate it). Very pleased so far.