clearanceman, I got the buzz buster Tuesday and finally got around to trying it out today. It is really easy to setup on the cable guard, it took me about 2 minutes to get it adjust and ready. My bow has a 6 3/4" brace height and worked just fine, but i believe anyone who has a brace of 6 1/2" or shorter might have to make a modification to get it to work. I just got that impression from putting it on my bow and i have not tried to put the bb on a bow with a lower brace height. Once i had it installed and tightened down i started slinging arrows. Man, this thing really works. My bow was quiter than it has ever been. The bb did an excellent job killing string vibration and noise. You could only hear a low thump sound as the string contacted the flexible rubber stop on the bb. I shot somewhere around 40-50 arrows with the bb attached and I' m telling you the thing really impressed me. I thought it might vibrate loose but it didn' t. With more shots it may but a little light duty thread lock should take care of that. As for reliability and toughness i can not comment on that with only one practice round. The bb is very well made and small. This is one more piece of equipment that i will add to my setup. This thing killed more noise and vibration than any thing i have ever had on my string.