Things I liked:Highly reactive and satisfying, great for developing anew shooters point of aim and concentration. Things I would have changed:More disks per box, we eat thru these things like mad. The shards are a bit tough on bare feet!!! What others should know:If you are having trouble getting someone who objects to firearms to try shooting... put a couple of these out in the yard!!! I got my pacifist wife to give it "a shot", she's hooked!!