It was stated that you were suspicious of some of the good comments, so I'll preface this by saying: I bought my system from samsclub.com and have gone through them and through High Tech with problems with the collars. (I also reviewed the system on Amazon.com, noting that I had bought it elsewhere. ) The electronic pet door and the underground system work great. I've added two other pets since I first purchased it, so I had to add more collars, which are expensive. When the first one stopped charging, I called Sam's Club as directed, and they sent another one out right away. Today, I called the High Tech customer service line, because a second one stopped taking a charge while the other was on the way, and I hated to call Sam's Club back, even though you ship the old one back. They immediately looked up the info and said they'd ship another collar. I asked if replacement batteries were available, and the lady said no, they're sealed in.
So, I've gotten immediate satisfaction with my problems, and think that's worth mentioning. It seems to be a very good company, and I love the automatic dog door you can get to work with the same collar as the underground fence. I added a battery to it, in case they manage to unplug it one day. It's impressive, I worried that if one dog with a functioning collar went through, and the next pet went through without a collar (or with a dead battery) whether the door would close. It's like an elevator door, it senses motion. I tried it with my hand before I'd let them go through it. It even says it's bulletproof.
