When I went shopping for the Simmons set, each bed store sale person asked me about the weight of DH and me combined. I didn't know the sets were different by how much weight would be on them every night. The chart I was showed how long the bed set would last if not bought to fit the weight of the persons using it. Not many furniture stores care enough to do that or know about it so go to a store that caters to selling beds if the weight combined is heavy. I have heard a lot of great things about the sleep number bed. DH and I are very happy with our Simmons, it is still as flat and comfortable as it was when new.