Purchased Sterns & Foster mattress based off reviews for long lasting and firmer sides. Salesperson suggested I get a softer top than the firm I usually get due to a back injury. When I first got the mattress I was happy, but as time went by the matress started breaking down within a few months. I have had the mattress about three years now and ready to throw it out. Disappointed. Too much money for something that doesn't hold up.