the first one we recieved had a catch in it that did not allow it to function properly, but a call to the company soon had it replaced with a fully funtional unit, and it is working flawlessly. the arrow group sizes were cut in half imediatly and have been closeing up as we have been able to shoot more with the good rest. i have an older ripcord on another bow and the new launcher is greatly improved over the originals. it is much quieter with the rubber and the felt there is no sound while drawing the bow or when the rest drops against the shelf as you shoot. as with all of the ripcords they are excessivly easy to attatch and tune, the only way to improve on that would be to put a microadjust setup in it.