I ve had mixed results with them over the years...dont use flat ones..they will never just come staright to it..they always swing around then all the sudden they cant see it or it looks weird to them they get nervous and leave. I ve had bucks that woulda past by me if it wasnt for the decoy they went around it not wanting to confront it. I did however set one up up a 170 class 5x5 one day that was going to work..buck was coming straight in ears pinned,hair up and he somehow spotted me and walked off.