I love my Sleep Number. I have asthma, sometimes have reflux/back issues. I like softer, my husband likes very firm. I have a split king, so I can put my head up, but he doesn't have to. I do have one where I can also put up my feet, but he doesn't have to, but it had too much pillow top even for me so it is in the guest room. So if my back is out, I sleep in there and put the feet up.