Haltis work really well, but I've had better experiences with the Gentle Leader, sporn harness, and SENSE-ation harness. Gentle Leaders are really similar to Haltis but I tend to like the Gentle Leader a bit more. They all work really well when teaching a dog to walk on a loose leash. The main trick is fitting them correctly. There's a video for the Gentle Leader that is very helpful and teaches you how to use it.