Purchased a TP bed about two years ago. First 100 days (money back period coincidentally) were great. Since then the bed is sagging worse than any conventional mattress I have ever owned.
There are visible imprints in the bed on either side where my wife and I sleep. You can actually slide from the middle of the bed into either "hole". Now back and neck pain is common from a night's sleep in the TP bed and you have to put blankets under you to fill the void.
This mattress is all hype and is overpriced. Save your money.
Product or Service Mentioned: Tempurpedic Mattress.