RE: Timberline No-Peep
Got one on my bow and it is great. It replaces your peep sight as well as increases your accuracy. This thing help me elimate a lot of bad habits that I didn't know that I had. It will let you know if you are torqueing your bow where as a peep sight will not. It also forces you to move your entire body instead of just your bow arm when you are moving to a target. You have to go back to the same exact anchor point every time. It creates good mechanics and it won't let you forget them.
It is really easy to set and is best done with two people but can be done with one. I did mine by myself.
I paid $30.00 for mine I would buy 10 more if I had to.
Not a gadget but a great tool.