The IceMat, whilst restricting your overall movement area suffers from none of the other problems, with the surface being almost frictionless yet still provides enough grip to be able to stop the mouse intentionally without loss of control, perhaps to make a head shot whilst sniping. Trying to explain the frictionless effect only brings to mind a cushion of air but yet the traction in both ball and optical mice is enough to be able to stop where you want and when you want with no sloppiness or overshooting the mark.