The first six months I had this mattress, I thought it was the best mattress I'd ever purchased! However it slowly started sinking in the middle and exactly after 11 months the entire middle sunk in about 5 inches. The warranty is an absolute joke. They require you to mail the mattress back at your expense just for an inspection before they will even tell you if they can help at all. And since I now live out of state it would cost more to ship the mattress back than to buy a new mattress. The warranty person named Chris acted like he couldn't care less about helping me in any way shape or form.