My husband and I purchase a new mattress every 4-5 years. He is twice the size of me, so his side inevitably forms dips and flattens, making for an uncomfortable night's sleep. I think we may have finally found a keeper in this Beautyrest! This is the firmest mattress we have ever had, and at first I thought it was going to be too firm for me. But after giving it a few weeks to break in, I am now sleeping like a baby!