We like a firm mattress and ours was wonderful up until almost the four-year mark. Then the foam went soft and we almost felt like we were lying in trenches. Now I wake up with a backache every morning. If I had it to do over I'd buy a good coil-spring for half the price. When I called the company and complained about the "trenches" the guy said to take a straight edge and a ruler, measure the depth of the dips, take and send pictures and maybe an adjuster would come to check it out. They make it very difficult to get justice. Very disappointed to spend that much money for something that didn't hold up.