I bought a 'Therma-pedic' by Bentley, and it is an absolute terror for sleeping two people. We sink too far into mattress and roll to the middle. The original Tempur-Pedic (firm) doesn't sink very much and is a much better sleep. So watch out for what you're buying. We found the TempurPedic 'on sale' at less than half it's original cost, so got it for the same price that we could have bought a nice "Sealy, or Simmons.''