We are going to finish our upstairs this spring, and will be moving the bedroom up there when we do. One thing that will not be making the move is our decrepit full mattress. This thing is so bad, you can hear the springs "boing" when you roll over! DH wants a king, but I don't think it will fit up the narrow staircase. We have slept in two twins pushed together, but I was afraid that I'd lose DS in the gap. I saw this thing in a catalog that is a foam piece that bridges the gap between the mattresses and a belt that goes around the mattresses and holds them together.
Has anyone tried this? I'd love to know!