My worry is it's essentially another set of patterns, although perhaps with a greater accent of flexibility and portability. Looking at what's offered - a map of various inversions across the fretboard - it's not that different from how I approach the instrument although obviously far more comprehensive and no doubt with lots of good exercises.
I know there's no point in me making such a long-tern commitment. I'd like to be able to buy short, relatively inexpensive, courses to address particular issues in my playing.
Interesting, I've typed out along reply, but I think I should start a new thread...