I know how it works on my dog... he stops the behavior. And he gets pretty wound up... the more excited he gets the less he hears "No". All I have to do now is say "Collar" when he starts barking out of the blue. It doesn't cause pain, therefore no escalation of aggression, but the dogs hate the smell.

The product flyer that the rep sent me has the necessary disclaimer - "may not stop ALL animals" but no deterrent stops them all. This one is humane and it can't hurt you if you get blowback.

My pet service uses it as well, both the automatic anti-bark collar like me and the remote control off lead training collar (which I just bought). And they've used those aids on many dogs, many breeds.

That's my personal experience.

The things I like about it are the humane nature, the safety to the user and the lack of legal restrictions to purchase/own.