Have a montana elk/moose decoy it works well to calm them but if they get the wrong look or have a long time to view and no movement it can be counter productive. I can say it has aided sucessful kills. I can also say it has hindered in a couple as well for sure. I will continue to use it but I make sure it is in position to maximize potential and not give my position away. Not a miracle product but it can buy opportunities if employed properly..not unlike other lure type products.