I've used it and it was a pain to set up for me. I don't know why, but it just seemed that I couldn't get it right. After getting it set up, it worked fine for your 20 yard pin, but the other pins are not centered in the crosshairs, and I just was not very accurate with it. I hear really good things about the Timberline No-Peep if you want to eliminate a peep sight.

The most important bloodtrail leads right to the foot of the cross