A very well-made mattress
Overall, we have been very pleased with this mattress from the very beginning, although it began to show some wear after about 6-7 years.
When we first got the mattress, it was absolutely dreamlike to sleep on -- the pillowtop was perfectly plush, but with a firm underlying support. We looked forward to getting into it every night, and dreaded getting out of it each morning. I can safely say that this lasted for at least the first few years.
In terms of durability, we have had it now for about 7 years, and it has held up reasonably well overall. Personally, I still sleep quite well on it, although it has lost some of its cloud-like feeling. We have not really had any problems with body impressions, which I know are a common complaint with pillow-top mattresses, which is probably because we have always been extremely diligent about flipping and rotating it. My wife, however, has started to complain of sagging in the middle of the mattress for the past couple years, and has recently started to tell me that she wakes up feeling rather stiff from time to time. This seems rather early for the mattress to be losing its support, especially since it is supposedly a rather firm mattress (underneath the pillowtop, that is). This review is for Sealy Posturepedic (Pre-2017)