I have tried the Hindsite Extreme and the NO PEEP from timberline. My personal opinion is the NO PEEP is a better product if you actually want to go peepless. It will teach you consistant anchor points if you use it correctly. After using it for a while I can shoot without it or a peep relatively well at hunting distances.

The hindsite works but can be a bit confusing because of how it operates, especially under pressure. And it will not work with a single pin movable sight. (unless you don't want to move it)

Both are a pain to set up for the first time.

With a good string, a string loop and properly located and tied in peep you really shouldn't have any problems.

Paul