I only have experience with one brand of collar and I am not saying that another e collar out there is bad. I had a Tritronic 200 lite and had very good luck with it but the batteries went bad. I was considering getting a smaller sized ecollar. i was doing reserch. I decided to call the Collar clinic in MI. At the time they sold and serviced all brands of E collars. I asked them what brand they personally liked. They guy chuckled and said that they all owned tritronics. I spoke with him for a while aboiut why and I later found that tritronics will take trade ins on their old collars. It was a very good deal. So I got another tritronics and have no regrets.
Scott