Our pup Duke did not respond well to his first wireless fence. It was expensive, but the quality was not good. We had to stop using it, because despite training, it was making him aggressive, so we had to take a break from using it. Then after we started using again, it started to change fence size erratically, and eventually started over heating, both the transmitter and the collar when charging. The charge cable then melted inside the collar, so we had to stop using it. Eventually, we decided to splurge on the Halo collar, and I’m so glad we did. For some reason the GPS is slightly off from the picture, but once I figured it out and adjusted his fence accordingly, there have been no issues. Works great and the freedom it provides is so great. I love that we can use our phones as a controller, but this takes a little longer to link up and send feedback than I would like. I wish there was a dedicated controller to send instant feedback, like our e-collar, but that is the only minor complaint. We absolutely love it. And customizable positive and negative sounds is so great.
-Keith