Anyone have one...and how is it? www.selectcomfort.com
An ex of mine worked there and had one, it's alright, but very pricey. I wouldn't get one, but that's me. I think I prefer the memory foam mattresses and mattress covers.
There not that pricey though...you can get king size ones from ~$1700 to ~$4700 depending on the model and regular inner coil spring type king mattress run in that same range. In fact, a Duxianna king size cost much more than that... www.duxbed.com
You might have missed this thread: http://www.ferrarichat.com/forum/showthread.php?t=133564&highlight=mattress
I know 2 people that have them and both say it solved all of their back problems. I've been comtemplating one.