Hello Fireboxboy,
Welcome to this forum and the great group of spineys here.
I have not tried a Tempur-pedic mattress though I have tried a few in the mattress stores. I certainly didn't give them the all night test, howver, my ole back was not that impressed. Perhaps like Carrie (CarolDiane) said, they may be fine for a "well person".
For me the worst is a pillowtop or a firm mattress. Pillowtops may feel fine at the store, but after a few years they feel like a hammock. TOO much foam/fibers that compress where you lay for me. I tried to sleep on my daughter's firm mattress one night and it killed my back.
THEN, by chance I tried an air mattress. I have been sleeping on one for the past 18 momths. I does take a bit to know how much air pressure is right for ones body, but that's about it. Oh, and the price is right.
Oh yes, there is another "air mattress' company and I tried their mattress too for several years. Not pleased.
Best I not get into brand names here because EHealth does not like that. Send me a PM and we can chat more openly.
RichT