IDkTm, I have a Carter One Shot. It is a very good release. I probably own around 25 index finger style releases and can honestly say that none are any better than the one shot. The best thing about this release, IMO is that due to the double sear, there is absolutely no detectable trigger travel. You can adjust it so that a stiff breeze sets it off, or go clear to the other side, where it takes two grown full grown men to tug off a shot, and the trigger travel is still the same...NONE!
The only downside is that you must shoot it with a string loop, or with release rope, due to the small channel used in the caliper. You could not get the release to close on a main string.
It also has a built in safety that you depress with your thumb while drawing your bow.

NRA,UBP,BASS Member
New Stanton,PA