RE: How many use a single pin sight...
With my old sight I had 3 pins and I slid the one to the top and one to the bottom and only used the one set at 20 yards, that way if I broke it I could slide a different pin down. I got the VBG Proslide because I liked the single vertical pin and it was very bright and smaller than some of the others. It also seemed to be lighter. I need to come up with a way to dim it down a bit though, in the sun it can be hard to see the target it is so bright. I also like the glow in the dark strip under the fiber optic cable. With my VBG sight andmy Hind Sight II (glows in the dark too) I could actually shoot my bow in the dark (assuming I could see what I was aiming at).
I always leave it on 20 yards while hunting and shooting 3D, I feel it is better practice shooting 3D the same way I would be hunting. This is my favorite sight yet.