Do to delay in our remodel, I was not able to open the pkg right away, so the mattress was vacuum packed for longer than I guess it was supposed to be. Once it got opened, it just never sprung fully back, and now the outer fabric hangs loose and the springs seem wobbly. I wish the carton would have said in BIG letters "Open pkg within x days of receiving!" Instead, I think they had a little note about that on the packing slip, which of course I never unpacked until it was too late. I can't really say how good this mattress might be. But just make sure you are ready to receive, open and USE/unpackage the mattress right away, because it is clear that leaving it rolled up damages it.