This is my first purchase of a memory foam mattress, although I did purchase a 4 inch memory foam topper from Great Offer Stock a while back and was pleased with it, so I thought I would give this a try since it was so economical. My previous mattress was a Sealy Posture Pedic extra firm queen, so I wanted to make sure I had plenty of support, but I also wanted some of the plushness of the memory foam as well. I kept my original box springs for the new mattress to rest on and got rid of the old mattress and this arrived very quickly. I didn't even wait the recommended time as it plumped up immediately and without any smell that other reviewers posted about. So far it has been extremely comfortable and I hope it will last out its warranty. I did have to get use to moving around on the memory foam as it is vastly different from a regular mattress, but it is very comfortable and plush while still providing excellent support,