We love having a responsive dog now. Our dog Sully knew the commands from being trained on a leash. Using the SportDOG e-collar made it easy to transition from the leash. The SportDOG training videos were so informative and made it easier to do that. We are so pleased with his e-collar and it has made us feel so safe that he won't run away from us where bad things could happen to him. Having a dog that is obedient makes us happy and it even makes him happy to please us. We would recommend the SportDOG e-collar to anyone who wants to have a happy dog too.