I took my Yorkie to MKB for basic obedience training when she was a puppy and I was not impressed with Dorothy nor her training method.
My dog was the smallest dog in the class and Dorothy constantly picked on her, calling her a 'spoiled princess' repeatedly and using negative training styles which neither I nor my dog appreciated. I have since trained her at positive reinforcement classes and she has done great! She loved the positive reinforcement classes and picked up the skills very quickly. In Dorothy's class, my dog did not even learn to sit - she was terrified of Dorothy and the punishments.
My dog has a sweet temperament and has never met a soul she didn't like except Dorothy. We dropped out of the classes midway through and switched to another training school and it was a great decision!
Perhaps if you have a big dog, this class may be more suitable for you. I felt that Dorothy had a negative attitude toward small dogs.