When Jack arrived for our first appointment my husband and I were frustrated with our dog's behavior. He immediately assessed our situation and within two hours had redirected us to learn how to assume the role of alpha dog and to 'speak dog' to Lucy. At the end of that session, she was coming when called, not jumping up, and remaining outside her 'no go' zone. Amazing!! Jack is THE BEST. I must confess when I first went online and read the reviews on Barkbusters, the comments were so positive, I assumed he had to be too good to be true. Not soâ€”Jack is the real thing and he's worth every penny of the cost of training your dog.