I've had very good success with the Predator 4 pendulam site. It takes some effort to set up. The thing I like about this site is that it has a doo dad on it to compensate for arrow speed. It is n ot an exact science to set one up. If you have a fast bow you start with the doo dad in a higher position....slower bow you move the doo dad down. The one thing you have to keep in mind when you are hunting is that you have to remember to place the pendulam mechanism in front of the stop when you get in a tree stand. If you do not you will have huge problems (ask me how I know!!!!)

The thing I like most about the pendulam is that you only have to concentrate on the shot and your mechanics... Mine is on from 2-28 yards. I drop about .25 inches for every yard past 28.

Spend the time in setting the site up. It will pay off.