I purchased this mattress @ two months ago and it releived my back pain from the 1st night! I researched mattresses for about 4 months before I purchased this one, and I am extremely happy with it. I was worried that i may sink down into it because I am 300#+, but it has held up very well so far. It had a smell for about a day, then it went away, but it was never overpowering. I would reccommend this mattress to anyone, especially larger people. It is the only one on OS that has 5lb memory foam. The others have 2-4# foam. This is a really good buy.