I was really amazed how the mattress expanded. The reason I decided to buy this bed was because I had recently taken a trip and stayed at a hotel that had a tempur-pedic bed . Needless to say, I fell in love with it. I looked everywhere for a reasonable priced mattress anywhere from 2500 to 10000. This is truly the best priced and best quality.. I would definatly recommend this bed to any one. Although it is not a tempur-pedic it is as close as you'll ever come at an unbeatable price.