I wasn't that impressed, it's just one more knob to fiddle with when you probably have more important things to worry about when lining up a shot.
Ditto.
Mo simple is mo better, especially when it deals with hunting and its related equipment. The 5 or 6 seconds it is going to take you to crank that knob around is the 5 or 6 seconds you could have been squeezing the trigger and watching that buck go plummph right before your eyes.