This Heavenly Bed Beautyrest BR800 Medium is Huge! 
The pillow top mattress is smooth and somewhat bouncy. This is a good bed for couples. 
There is plenty of room to lounge, rest, and sleep, and other activities. 
It's a firm yet soft mattress, with good support and so far has not caused back problems. I sleep on my side and after a few toss and turns, I manage to get comfy and sleep well through the night.