When I started bow hunting two years ago my son recommended I get a pendulum and a wisker biscuit rest as I only hunt from a tree stand. I got my first deer with the bow this year, a 26 yard shot. I have enough to think about when that moment arrives, like making sure the deer doesn't hear my heartpounding as it tries to move up intomy throat! I don't know if I would remember which pin to use, so the pendulum works for me.