I'm impressed!  I ordered this for my RV, knowing it would be hard to get a regular mattress in and around the corner, to the bedroom.  I was big and heavy, but compact enough to get into an RV while still wrapped up.  My husband and I wrestled it in and unwrapped it.  It was fully expanded within a day, with no odor at all.  The mattress is extremely soft, but we don't sink, and very comfortable.  I would buy this again in an instant!