does everyone feel sorry because it has Cesar's name attached to it? or is there really something wrong with it? As far as I can tell some people can teach nice leash walking with no aids in training. Almost everyone else relys on some sort of leash and collar.
Some use flat collars, and make lots of turns, dog hits end of leash and learns to walk on a slack leash.
some use choke collars, slip collars, etc. Some use prong collars. Some use collars or harnasses that go around the muzzle and will jerk a dogs head back or sideways by the muzzle and call them "gentle leaders" Others will jerk the dog's head down to the ground between their legs and call it some other type of harness.
The muzzle is a very sensitive part on a dog, so is the upper part of the neck where this collar keeps the "corrective" part of the design so it is most effective. Besides looking different, what makes it so much worse than any other aid that people use to be able to walk their dogs?