Ive got one on my Vtech and its an amazing difference... just wait till you feel the shot w/ it on.. absolutely no hand shock. It might seem loud to you casue there is sometime some slap sound, but that is directed backwards so have a friend listen to it, or shoot it for ya, you'll see how much better it is.

Also, you will want to serve the string where it contacts, either that or you can do what i did: I have two of those rubber buttons like what you use btwn your arrow and the release, that are at the point of contact.