First any type of release can be shot using "back tension" or correctly. I used a wrist scap index finger release for several years and was quite proficient with it. I started usinf thumb trigger releases for target shooting and once I made that change, I started hunting with them as well and was very successful using them. The best way to set this type of release is heavy (for the pressure to make it release) -- this goes for target shooting as well as hunting. Most top shooters (there are a few exceptions) set there releases heavy, even with 2 extra heavy springs. Your choices are good ones for this type release -- the Truballs and Carters are both excellent. I do not like the one Truball version that has the trigger travel.

That being said, I can still easily "jump on" thumb activated releases and I tend to do so more than I would like to -- thus I have gone to triggerless (back tension) releases for all my target shooting. I may actually go back to and index finger release for hunting this upcoming year. I don't shoot that type of release frequently, however since I have not shot this type for so long, I have basically re-learned how to shoot one when I try one. I believe that shooting pure BT releases has trained me on how the shot should be executed and I do not have any urges to move my index finger at all when shooting these releases now. I prefer a no travel trigger mechanism set heavy. A lot of guys like Tornado releases but the trigger travel plays havoc with me. Tru-fire has a new release out that is really slick that I think I will try it. It has adjustable travel down to zero, adjustable sensitivity from hair to very heavy, and the head rotated in front of the trigger so no matter how you anchor, you will not have to fish around for the trigger -- it will be at you finger all the time. This also eliminated any torque applied to your D-loop or string. And you can open the jaws with the trigger mechanism to attach it. It seems to have everything, including their new strap.