I received this &cç quickly I was shocked.  I opened it and it popped right up.  It only took about an hour or so to look completely "like" a mattress.  I waited a couple of days to sleep on it and it was very comfortable.  Not as firm as I would have liked but I slept well and I never woke up until it was time to get up.  I have no complaints so I hope I will feel the same in a year.
I would certainly recommend this mattress.