Well there aren't too many of these, but I used to have one on my tricked out Spyder. 100% prevented chops for me, I never chopped with this bolt even when trying. It is Nylon so it doesn't need to be lubed. The only problem i've heard of were some of them were snapping, but I heard they were all replaced, and this never happened to me, so I was happy.
Great Spyder bolt if you are encountering many chops and want a new bolt anyways.