Hire Lissette and Derek - you won't regret it! My dogs are my children and my world. But my leniency had resulted in them running amuck, and none of us were happy. After thorough online research, I found Lissette and Derek. The reviews were oustanding, and their and Bark Buster's humane training fits my outlook. After the very first session, the dogs were already behaving better and were clearly more relaxed. No whistles or shock collars - just some easy exercises that provide instant results. With 5 minutes of "homework" a day, my dogs are quickly developing good habits. Lissette and Derek are thoroughly knowledgeable about dog behavior and explained why the dogs do what they do. With that information, I understand what is happening and why Lissette and Derek's exercises work. We are on the way to a very happy home and I am extremely grateful!