I purchased this mattress for my daughter and her husband.  It bounced into form very quickly, well within 24 hours. They've only slept on it for one night so far, but they raved about how comfortable it is. Their previous mattrass was a very expensive 14" plush pillowtop, medium firmness. This one is pillowtop/firm, and they like it better so far. At a quarter of the price I'm hoping it will last for several years to come.