You need 2 people to unfold the mattress. It well packed and be careful to unpack. Absolutely no smell, we unpacked in the bedroom with windows open on a winter day/60 degrees in Atlanta. Left the windows open for a couple hors, made the bed, and tried it. I could not leave anymore:-))) I read the reviews before so I chose the medium firm, was concerned about the smell, and the time it will unfold, also the firmness. I'm 5"3, 122 pounds, I think I ever been so comfortable in a bed. I cannot wait to sleep in tonight....