You can ajust the trigger to fit more comfortably.
Interchangeable Tension System

The Only comes with 3 crescents,The cresents have marks scribed onto them in 2 places. One set runs along the outer edge of the cresent designating position of the angle.
You can change the speed and angle.
It has a thumb rest

The Carter Solution 2.7 is a pure back tension release aid with integrated safety device. To draw back, engage safety feature, once at full draw disengage the safety feature, then proceed with back tension form of release.

Carter Solution back tension release aid, a good simple back tension to use rope or D-loop