This is a really nice mattress.  It's firm without feeling like you are sleeping on a board.  Just enough cushioning.  I let it "air out" for 72 hours, but there really wasn't any smell.  It just needed to fully expand.  The only drawback is that this mattress is very heavy.  My bed frame has side rails.  It is almost impossible for me to lift it to change linens, and lifting to tuck sheets or blankets under is impossible unless you have help.  Perhaps not an issue for a younger, stronger person or a couple, but it's a big challenge for me putting and keeping linens on the bed because I just can't lift it more than an inch or two.  Otherwise, I love this mattress.