I shoot 3D Comp and bowhunt with the Winn Free Flight C10 Glove Release and have done so for many years. I went to it after having wrist surgery and was unable to use a wrist strap release and since I had some tendon and growth removed from my wrist I wasnt able to pull back as much pondage anymore. I was drawn to the release by its claim to make you feel like you are pulling back 10% less poundage than you really are ..... and its true... I can now pull back 65lbs with the glove release.
I have shot it off the string with great results and I also find it works very well with a string loop even though it wasnt designed for loop shooting... yes it takes a bit of time to learn and perfect loading and locking it on a loop but now its like a reflex. Shooting it off a loop will lengthen your draw lenght just a bit. But with the short head on the release it keeps the head in close to the hand. The head does have a bit of free play for rotation that I am able anchor with my hand basicly horizontal but with the pinky raised just a bit to the sky and the thumb down and off the face.
I dont hold the release at full draw, I relax the fingers and let them hang and use the back muscles to basicly shoot it as much back tension as possible, dont go punching that trigger[:@] The glove is a great investment and when it wear out you dont have to buy a new release you can just order a new glove and put the head on the new glove yourself. And when the velcro starts to wear out you can buy replacement velcro at the sewing store and a sewing machine leather needle to replace the worn out velco after many years of use.
I have been successful in winning in the money at the ASA PRO/AM's, winning the ASA Illinois ASA State Championship 2003, Winning ASA Illinois State Qualifiers, Shooting Indoor 300 rounds, and many other 3D Comp while using the Winn Free Flight Glove Releases and have harvested Bucks, Does, Coons, Possums etc shooting the Winn Glove.... I missed the flippen turkey last year.
Its a well made release , and if you want to use it for hunting make sure to spray it with scent killer, it being leather in your hand it will absorb some body odors.

I am playing around with the T.R.U Ball Chappy Boss Release but havent been able to develope a consistant anchor point with it yet so I keep on going back to my old favorite the Winn Free Flight Glove Release.
If you try one you may be very happy with it, I have seen many a finger shooter make the switch to it and be very satisfied with it.
To me shooting a Winn is a WINN WINN SITUATION
Good luck and I hope you find the right release for you.