Thanks to this collar, WHEN USED PROPERLY, my dog is coming when I call now and is not as willing to stray from my side anymore! But, please be advised, it is a must to read the user guide before using this collar. You could really hurt your dog or cause him to become very fearful of you. The purpose of the collar is to teach a quick recall in a hunting situation AFTER your dog has been properly trained to verbal cues! I have a beagle and he loves catching a scent and amazingly disappearing in a second. With this collar, I simply put it on before I turn him loose and when I notice he is getting too far from my side, I call and correct him. He comes almost instantly. In the past, I would be hunting for him for hours and he refused to come back when he smelled a trail. With a touch of the correction button on low, he comes back within a minute! The best part for me is that it's like having an invisible fence with you at all times. I don't have to keep my dog on a leash anymore!