WMO1.1a atleast as good as a ball mouse without any of the potential issues with the ball clogging up, etc. anyone that plays that good on a ball mouse won't play any worse and possible better on one.
Still don't get the fascination with laser mice almost all of them exhibit some degree of skipping and some degree of erratic input.
The Steelseries kinzu V2 is pretty decent but a tiny bit too small for most people physically and the sensor while good has some minor issues - gonna have to give the zowie mice a whirl at some point as I find zowie mouse mats very very good and one of the biggest aids to how precise I can aim regardless of mouse.