If you do not use hotkeys to control your units it's hard to believe that your micro does not suffer. Think of kiting with tanks. I usually reverse away from infantry, then press hold button to stop just before my tank is ready to fire again (Tanks fire 50% more accurate while not moving). Do you click each action with the mouse?
I'm confused is this directed at me? I use hotkeys. Also I think that is a really gimmicky, useless peripheral, no offense.
I do agree your point about being used to something that you shouldn't keep doing it. For any new players, mouse edge scrolling, grid style hotkeys & clicking on the minimap are the best methods of control. Control groups and tac map aren't necessary but if you can manage to work those into your gameplay it may give you the edge.