Amazing! I have two Boston Terriers that were always wrapping around me. One would go one way, one the other. While they were both very good on their leads, it was just sometimes unmanageable. I bought two Buddy Belts and a coupler and presto, new dogs! It is so much easier to walk them. It did take a few walks to get the 5 year old used to occasionally being pulled by the 2 year old, but now they walk together like a well trained team. I love this product!!!!!