Lumpy saggy hammock

Initially the mattress was great and comfortable. We regularly rotated the mattress to keep it from developing body impressions. Well it didn't work. Within 3 years we were already looking to replace it, but after spending the amount of money we spent, we thought we should keep trying to make it work. 7 years old and the sides are literally starting to blow out. My wife and I regularly wake up in pain. We never tried the warranty because it's a prorated deal. So after so long it doesn't make much sense to try and recoup something only to buy another one from the same company that I didn't really care for. For the money we are very disappointed in the durability of this mattress. We bought it from Mattress warehouse and honestly I don't want to deal with them again either. I felt like we got hosed buy a used car salesman. In summary I wouldn't buy this mattress again, at least not at the price point. At half of what we paid sure.