Hi, I bought one of these mattresses 11 months ago and there is a huge indentation in the middle now, where my husband sleeps. He is 6'2" and weighs 235 pounds, and we have it on a platform bed on a very solid wood foundation. When I lie in bed with him, I roll into the center where the "dip" is. It is very uncomfortable. It was great at first, but it has deteriorated rapidly. When I unzipped the cover it came with, I found that there's only about a couple of inches of memory foam, like a topper, and the rest is that cheap foam that foam only mattresses are made from. Unless you're under 125-150 pounds, I would not recommend this mattress. We are going to cut it in half and use at as two twin beds for kids. I am very disappointed in this product, and we had to pay a lot to ship it to Alaska, since Overstock does not ship here. It was a waste of money.