I bought this for our German Shepherd as he has a few issues when it comes to walking time -leash pulling and lunging at other dogs mainly-. We have already a choking collar and it worked a little, but definitely not as well as this prong collar. The change in attitude is clearly noticeable, and we are really pleased with it. The quality is very good, and I must add that the size is a little big for a GS, but it is not a big deal as it can be altered. All in all very happy with the product.