I'm not a fan of either halti or gentle leader. I have witnessed some not so good things with them. My choice is a prong collar...they do less harm that both and less harm than a choker. They might look medieval but they definitely are not. Once the dog has it on it's like something clicks in and the dog will refuse to pull. But you need to be shown how to use it properly. With a halti or gentle leader the dog never seems to learn and some dogs develop bad sores on their faces from the rubbing.