I was looking for a new mattress after an expensive "hybrid" foam and coil one I bought at a furniture store gave up the ghost after less than 2 years. I went home for a visit and my family, who had just bought and furnished a new house, had this mattress. I fell in love and ordered one when I got home. I've slept on it for 8 months and it still looks and feels like it did on night one. I'll never go back to coils and if this mattress does wear out in a decade or two, I will buy another just like it.By the way, I'm a heavy 310lbs on a short 5' 5" body and I have not seen any "ruts" like other reviewers. I also tend to lay in one spot, so I would definitely notice. I haven't even rotated it yet.