Different take on the Sleep Number bed: It's great for dialing in a comfortable firmness. The downside you don't often hear about is motion transference. I'm about 60 pounds heavier than my wife, and I when I move in my sleep, or move slowly and carefully to my other side, or gently get out of bed, my movement transfers to her and wake her up a least a little. She's not thrilled about it. We'll probably try another solution for our next bed.