I am really happy witht he products, I have a very large Bully, and he treats and wears the collar pretty well. Now he walks obedient with it on. Now I enjoy walking him and he looks happy and tired after. The product is a good quality though it looks like a torture device. I tried it on myself to make sure first. The shipping was prompt. I would recommend it for anyone who tried any other means without success, like me. But first I would advise a proper training to use it correctly. Thugh the available YouTube resources may be enough to train to use it properly with the result for you and your dog.