The only problem with the Select comfort king bed it is so piercing cold. I have put 3 blankets and 2 toppers and plus a comforter on mattress trying to keep the heat from being pulled out of our bodys.The arthritis in my spine hurts so bad many times I sleep on top of the beds covers.My husband get severe leg cramps from the cold bed. We live in Oregon on coast.  We do not have this problem with a regular mattress as we motel it a lot. We do run heat at night at 69-72 degrees. Tried a reflective heat topper it has helped some. The bed is very comfortable back doesn't hurt when bed...