I purchased this mattress to replace a older memory foam that did not have the gel memory foam.  It was 2:00 pm when it was delivered. I unpacked this mattress and put it on my bed. I know you are suppose to wait 24-48 hours for it to expand and decompress. The first night it felt very soft and I thought oh no. The next night it had firmed up and was absolutely perfect. I slept all night and didn't wake up hot or sweaty. The third night it was more comfortable than I could have ever imagined. Do yourself a favor and purchase this mattress. I got the 14" because I have a lot of deep pocket sheet sets. I am very happy with my purchase and would recommend to family and friends. Thank you Comforpedic Loft!