I bought one after a friend said good things about it.
I have not hooked it up yet as getting to a ground spot is not going to be super easy from my two story house but it can be done.
I don't feel like plugging it into my electric outlet ground plug is the right way to go. I want the wire going all the way directly into the earth with the rod.
When I get it wired up and using it - I'll post a review too.