You will be glad you used one!!! it is sure fun.....
here is some advice, dont expect success every time, and keep it as scent free as possible!!!!
also, place the decoy in an open, easy to see area, as if a deer is surprised by the decoy, they may spook......
just some thoughts....
Face the decoy towards your set up between 18 and 25 yards, as the approaching buck will show his broadside to the decoy's head. he will stay between 5 & 10 yards out from the decoy, putting him in your comfortable shooting range! if a buck is super fired up he may just charge the decoy immediately.....but thats why you bought it.....to get it broke!!!
good luck!!!