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I have been sleeping on one of those sleep by number air beds with the air pumps since the turn of the century. My half is set at a different firmness than my wifes side, and instantly changeable. It is very comfortable and I would buy it again if it ever wore out, which is unlikely to happen any time soon.Spend the money and get a nice thick pillowtop whatever they call it and you will likely be very happy.Oh, and the cool thing is,you can get a king size up and around tight stairways because the bed is in manageable size pieces unlike a regular king size mattress and boxspring.Steve Nickse