I used one a for a bit with a peep, it was OK but there are much better options IMO. My recommendation is a good sight with level (Excel)for 30-40 yds and a 'Square Up' rear sight if you want to extend to 60+yds. The Square Up insures that you will not torque the bow and you look through it all the time without thinking or changing focus from the animal/sight picture. I have no affiliation with the company - just love the product.
