I agree that the gentle leader is the greatest tool for instant control. What I really love about it is that I see weaker individuals with big strong dogs pulling them around and really hurting their arms. When they change to a gentle Leader, they have total control and no sore arms. The nice thing is that when the dog is fully trained and knows what is expected, you dispense of it and your dog will walk on a flat collar and loose lead. I've seen some owners keep them on their dogs for aggression issues, but then that would be another category. I mostly see this at Pet Smart, where owners want to bring their dogs, but can't control the aggression. This way they get to bring the dog and everyone is happy.