We purchased this mattress about 2 years ago and already it sags a lot. I have turned the mattress as suggested in the manual and still it sags. Unfortunately, because its a pillowtop, you cannot flip this mattress. We won't buy a pillowtop ever again. Because it sags so bad t has given me back problems and I find it very uncomfortable to sleep at night. I contacted the company because it's suppose to have a 10 year warranty. They sent me an email back asking more questions and I replied. I have answered but I haven't heard anything and it's been several months. Don't buy this mattress because it's poor quality and the customer service is bad.