We switched to the Sleep Number bed from a waterbed and really regretted it. It's just not as comfortable. (Regular mattresses would be much worse, of course.) We ended up buying a massively thick feather bed, and sticking it inside the Sleep Number mattress, right above the air bags, and below the mattress ticking, replacing their 1" thick eggcrate foam insert. (Otherwise, it would get this well in it where we sleep, and wouldn't be doing any good.)