Milescraft Router Pantograph

Ok...I just ordered a pantograph for my router.  I haven't had a chance to set it up and try it yet due to some other projects I'm working on.  I was fascinated by this tool!  Has anyone every tried one?  I got mine at  Amazon for a pretty sweet price.  I'm anxious to try it out.  Videos make it look so easy, but I must admit, I'm not real experienced with routers, outside of the basics.