Heck yeah they work. I always put one on the ground, one half way up the tree, one as far up as I can reach above my stand and one attached to my stand. It's like I'm not even there.

LUCK:::; When presistence, dedication, perspiration and preparation meet up with opportunity!!!
- - - - - - - -A government big enough to give you everything you want, is big enough to take everything you have. Thomas Jeferson - - - - - - - -