My back and knees ach when I get out of bed in the morning. I've had this mattress for about 6-months and it is sagging so badly that is looks like it's about 30 years old. Very, very disappointed. Plus the "underside" looks like it's not finished, and I found out after it was delivered and set up, that you can't flip this mattress which means it will wear horribly, which I'm finding out. I will never buy another Sealy mattress.