Anybody here have one? The ratings seem very good. I've slept in many hotel beds, no matter whether hard or soft, some were very comfortable, some intolerable. I think that after 16 years on what has been a very good mattress, my sore back deserves something better. I don't attribute my sore back to th bed, but I feel it does not help any longer. I really like the adjustability factor as I don't want to be testing and returning various beds, and the 360 app is a bonus. I'm looking at the basic C2 with no adjustable base as I have a water bed frame.