My wife and I bought a king-size tempurpedic a year ago just after I herniated L4L5. It is the absolute best. They threw in four of the pillows for free. Every night when I lay down it is heaven. With the old beds I used to have to kind of work the kinks out before hopping out of bed and into the shower.
I roll right out of bed with no kinks. I used to go to the chiro regularly for adjustments. I haven't been since we got the matress. My back injury is not 100% clear yet, but I have gone over 365# deadlift multiple times in the past 4 months. Worth every penny, and it was a lot of pennies.