Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good but not perfect

I have a Siberian Husky that was inherently designed to pull. Initially I bought only the the buddy system without the bungee attachment but after a few runs I thought it would be worth the extra ten bucks. I love the overall system, however; there will always be some level of pulling depending on your dog. Even though the lunge buster significantly minimizes pulling I would not recommend it for avid runners with back problems. The pulling places some pain on your lower back. I guess you have to weigh the pain on your lower back versus your willingness to compromise your running form with a regular leash. Furthermore it is harder to control your dog because the bungee system is so flexible. Ultimately I am very happy with product.