It's great stuff if you respect its peculiarities.
It is not really mainly for keeping chickens *in*, it is for keeping fourlegged predators *out*. Thus it is certainly possible to have chickens occasionally go over the wall. And you really oughta have a good accurate fence tester to ensure it is carrying sufficient voltage to impress a dog or etc (4-5,000v... considerably more than you can get away with for horses or cattle)
It will sag unless you add additional posts to tie it back to; in strong wind or ice storms it will sag no matter what you do. When it sags too much, it grounds out.
And you MUST move it regularly to mow close underneath it, otherwise it grounds out.
It may sound like I am speaking against it, and I'm really not... I like it a lot. But you have to be on the same page as the fence material, you know? You can't just do anything anywhichway with it and expect it to work.
It is btw SUPER easy to move and install.
Good luck, have fun,
Pat