There are posts about these on the forum somewhere.
I have the Loesch and it works really well. The main reason some have difficulty is the setting of the release weight along with the technique used to get the final reaction. If you are hesitant it becomes a real struggle. That would be the same for the Carter, I suspect. If the holding weight is too light, there can be a tendency to become over delicate with it and that brings hesitation.
I feel the setting needs to be heavy enough that you can reach your references and keep pulling into the stops without worring about getting too gentle with it.
If you feel you have to stop pulling before you press the safety, it is difficult to start the pull again.
found the pages.
http://www.archery-interchange.com/f...?t=4832&page=3