It really works. My dog is stubborn, I MEAN STUBURN!! lol lol lol But You can really see / hear the difference. When we go for a drive he is Unbearable, as he whines so loud and so much. But with the collar on, you can literally see him try not to whine . It made for a peaceful 3 hour trip. Now without the collar on, he thinks before he whines or barks. I do not use full time, but when he gets out of hand, on it goes.