I just got one put on my guardian. So far so good. I have only had the rest for a few weeks but i get zero contact with my blazers and the rest. It works by(what im told anyway) connecting to the down cable. When you draw your bow back one of the cables moves up and the other moves down. Most drop aways attach to the up cable so when you pull your string back the rest goes up. Well this has a built in trigger so when you draw back the down cable goes down triggering the trigger built on it, and when you release the string the trigger goes off dropping the rest really fast for clearance.