I just had to comment, that I just bought it today for my Pup. At 62 lbs, when he pulls you certainly feel it. However, I tried it out anyways, and to my amazement, it was like a new dog almost. As soon as he started to pull, he would stop himself and ease up. I guess in some way, it must be uncomfortable somewhat for him when he pulls hard, so he self-corrects himself so as not to make it pull. Worked like a charm
