At first we were very pleased with our purchase, however that was short lived. We've only slept on the mattress for 6mo and there is a noticeable (both visable and felt while laying) hump in the center of the bed and two caved in spaces where we tend to sleep on each side of the middle hump. Very disappointed. Our old mattress lasted more than a decade and didn't look this bad when we finally decided to upgrade and buy this new one. For being such a reputable brand, the quality sure is lacking!