We have been sleeping on the Sealy 10" Medium Gel Memory Foam Mattress in a Box for 2 weeks. It is a definite adjustment from an innerspring mattress. The mattress is comfortable. It took 24 hours per the instructions to fluff up and become firm, we did not have an issue with any mattress smells while this was taking place. I am still undecided on whether we need a firmer mattress, I am concerned the gel memory foam will break down over time and not be as firm. We did buy the 15" Adjustable bed with remote to use with this mattress, and we put a 2.5" mattress topper on it too.