I'm looking into getting a fence for my dog. She keeps on getting out and I hate having to tie her up when we have a fenced in yard and I'm terrified she hang herself. Had a neighbors dog do that when I was a kid. She most likely wouldn't hurt anyone, but she makes it known that she doesn't want anyone near the yard.Anyway my point is, does anyone use or know anyone that uses a system like this, and if its a good investment.