Hell yes. I have a 10% disability in my lower back....don't know if that means I'm 10% disabled 100% of the time, or 100% disabled 10% of the time...anyway, when I was going through all the doctors, rehab, pain clinics, etc, I got rid of my old bed and got a pillow-top, king-size waveless waterbed.
What a difference....like sleeping on a cloud. I was always tired before, because I couldn't stay in bed long enough. Ever since I got that bed, I have trouble getting out of it. Sleep like a rock.
It was damaged when we moved in May, and I replaced it with another one, except it has a memory foam pillow top. Still awesome.