I spent over $1,000 dollars on other trainers and got little results. For the first time in our 4 years together, Coal listens. Bark Busters helped me make Coal more calm, and he listens like he has never done before. If he sees another dog now, I just bah him and while he still might growl, he doesn't bark wildly and pull like he used to. I would say (in just one lesson) he improved 80%. We still have a few lessons to work on but I feel confident for the first time that we will be successful in having a calm, well-behaved dog.