Quick Shifters

[nick crisp]

No I haven't, never ridden anything with one. Hence my curiosity. How do they work? Is there more than one type? I'm not a particularly fast rider, although I give it my best shot now and again, haven't ever done a track day and don't know that I ever will get around to it. So I wondered if their use would ever apply to me  as a road rider. Posted, as said, out of pure curiosity