If you're convinced you already know it all, I don't see why you'd bother. Especially given your desire to run, run, run---that's very different from TGM's philosophy.
If you really want to try it, there is a money back guarnatee. But, I'm willing to bet you a mickeybar that you'll decide it's not for you.
I love TGM, and wouldn't think of visiting WDW without it (or the UG, for that matter) but you seem to already have your preferred way of touring, and unless you're willing to try things his way, it's not going to be productive for you.