Could use a bit of advice on a purchase.

I'm looking at picking up a new book and cd package
(http://mjspublications.com/low_band/gtstalayout.htm)
just for the mere fact that it has so much stuff in it.

My dilema is this.

I build my scales and view the guitar fretboard through the CAGED type sytem, where there is 5 basic shapes and they all connect logically. After speaking with the author he said that he does not teach this and does not recommend it either. I find that strange because it just seems so logical to me. Although he says he does view this when it comes to the Pentatonic shapes

I'm wondering how everyone else views the fretboard when it comes to scales and improv and piecing the entire fretboard together.
-Jon