Recently purchased this product to replaces a close to 20-year-old Serta box spring. Initially, the mattress felt strange on the body due to the heat from your body and the contouring of your body to the mattress. It is warmer and requires a bedroom with an air conditioner. My tightness in the neck, lower back and hamstrings disappeared. The quality of sleep improved which boosted energy levels. The bed is so comfortable it is a challenge to get out of bed in the morning. Save your money from purchasing a tempu pedic. Buy the adjustable base which adds comfort while watching tv. There are many retailers to purchase this fine mattress. My suggestion is Sears since they deliver, set up and haul away your old mattress and boxspring at a nominal cost.