The only reason I've given this mattress 4 stars is because the mattress was just delivered and I haven't gotten a true night's sleep with it. But this is one comfortable mattress. when we tried it in the store we were so surprised at how comfortable it was and how it conformed to our bodies. I have back issues and I really felt the mattress conforming to my spine and felt supported even just trying it at the store. It felt like christmas morning when the mattress was delivered! We are so excited! We will leave another review after a month to let readers know how it feels even a month later, but right now its like sleeping on a cloud and I don't know how we are ever going to get out of bed!