Update:
Got one for Fathers Day and got it mounted on my bow. It took a while to get set up just right, but it is very accurate and quick to line up. It's very unforgiving with your anchor point. If you have problems with a consistant anchor point, this thing will help you solve it. If you aren't lined up just right, you can't see thru it. As long as your pin is in the center of the "X", you'll hit the bullseye. By the way, another nice feature, the "X" glows in the dark.