Tom Hess is a master... At marketing. He's a good enough player and probably a pretty good teacher. I only stayed around on his site for two lessons. I felt they were pretty generic. Not that they were bad, I just didn't think they were worth the steep price he puts on them. I just don't feel right paying that much for 3-4 generic exercises and a few motivational speeches. They might get better, but I was a bit hesitant to spend hundreds of dollars before actually getting something profound, if that ever happened. What also irks me a bit are the bold claims in the ad copy that most other guitar instructors are no good.
But what caused me to finally decide leave the course was the amount of politics in his forum. The forum is presented as an essential part of your growth as a musician, and certain political discussions in there made me feel unwelcome. I had some abrasive interactions that made me feel very uncomfortable, so I left. I need to feel comfortable with the people I'm working with, and I just didn't feel that anymore.
Lastly: There's no money back guarantee. No try before you buy.