Hubby and I both have major inoperable back problems. We would never be able to walk in the morning if we slept on something other than our sleep # bed. Easy to move the king size, in the back seat of our car. Ours is 15 years old and still like brand new. As far as freezers go, the electric cost on bottom freezers is less than half of a top or side freezer. Remember, cold air falls! Hot air rises. When you open a side or top freezer, the cold air falls to the floor. In a bottom, it stays where it belongs. Electric cost are rising. Not a sermon, just a thought!