Very happy with this collar. I was unsure what to purchase and Christine was extremely supportive in helping me choose the correct one for my dog. I was hesitant to purchase a prong collar because of the look of it, but her knowledge and expertise was exactly right. It has been the best collar to work with my dog. The dog adjusted quickly without me having to hardly pull at all. The collar is well built, slides on and off easily, and is extremely durable. I would definitely purchase again although I think this collar will last forever!