I completely endorse Brad's books. They are great resources for what I do. I was trying to think of some criticism to balance out this post and I could only think of one thing. Brad, like Aaron Keim, can be a bit of a party-pooper by eschewing all those little things we obsess over such as tone woods, strings, fancy chords, and more and more scales. He has never said this, but his vibe is talk less, play more. I find his calling out my B.S. motivating and I am planning on getting his double-stop course because I have mapped out those sixth intervals but I have done it haphazardly; I want to see what an orderly presentation can do for my understanding.