The crampbuster does what it does well – in extended cruising situation it lets you relax your grip and maintain the throttle position by just pressing down on it with the heel of your right hand. It’s comfortable and relaxing. I had it on my YZF-600R for a few months. The problem with it on my YZF-600R is that with the handlebar at full lock to the right, the crampbuster would hit the tank if I had it angled down properly for a natural, wrist-down riding position. I had to angle the crampbuster higher than it should to clear the tank at full lock. As a result, if I wanted to fully close the throttle, I had to either be more wrist-up than normal, or shift my grip slightly and cock my right hand to the left more, to clear the crampbuster. It can be managed, but it wasn’t ideal. Another factor is I ride 3 different bikes on a rotating basis, each one with somewhat different ergonomics, and only the YZF had the crampbuster on it. Throw in stop-n-go traffic, darkness, impatience, and they added up to a small throttle mistake at the worst time.