What do you guys think of pendulum sights, especially Keller sights?

I used a Keller for years. Very tough and it works, my eyes got to where I needed the fiber optic sights so I went to a Trophy Ridge, but next year it will be a Vital Bow Gear pendulum

Check out Savage, they make the best pendelum sight on the market.

I love mine for hunting from a tree. With some practice and a good tuned bow, robinhoods shouldnt be a problem. I actually started picking different spots on my "backyard buck" target. Arrows arent cheap.

i have had one for 11 years now, and no problems at all. In fact i can shoot out to right at 40 yards eventhough the directions say only 30 yards. The are hard to see the pin at low light conditions tho.