I've used the Pet Stop system for over 9 years without a single system problem. I've had the line cut a couple of times by landscaping or utility installers but no system issues.
The receiver box on the collar finally bit the dust and fell apart a couple of weeks ago. I called my local Pet Stop dealer in Upper Arlington and they send send it out bring it in to be sent back to the main office. It was back in less than a week Ann's was under warranty. Only a $35 copay for a new receiver. Not bad since they normally sell for $250 or more!
As I've said, no system problems in over 9 years with the original system and a great warranty. What's not to like!