I own the Deluxe model of the Tempur-Pedic mattress system. It is a king bed. I love my Tempur-Pedic mattress system. It is very comfortable and supportive. It did take my husband a while to get use to the firmness of the mattress. It is very firm but soft and supportive at the same time. It will take virtually any shape that is under it. So you need to make sure that is is on a flat surface. We had it on box springs under a frame and it wasnt working out because, the frame pushed up the middle of the mattress just enough to cause it to push up. So we removed to frame and it has worked much better.
I love the fact that it has a removeable mattress cover that zips onto the mattress. It is mite resistant and can be launderd and placed back onto the mattress. It noticed that it is starting to thin out a bit in places and I hope that you can purchase a replacement for it if needed.
Overall we love our Tempur-pedic mattress. I had back surgery a few months back and it has really been a big support to help with the back pain. I would recommend this mattress to anyone.