I suffer from chronic back pain (9 years and counting... not a single pain-free hour in as long). Tempur pedic provides optimal support and reduces pressure points... I might sound like one of their commercials but it is true. The sleep you do get is more beneficial because it cradles your body, restricting movement and promoting a deeper sleep.
Basically the best mattress I have ever used. I tried the select comfort and other metal springs but this far surpasses all.