Hi r1p32.
I say it's not for beginners because beginners rarely want or need to use the whole fretboard. Most start out with the open chords and a few barre shapes and their playing is confined to the first five frets or so. Also, most beginners don't want to get into improvisation. However, if you are at the stage already where you feel like you do want to have the whole fretboard at your disposal and you do want to get into improv, then I highly recommend
PlaneTalk. I spent the best part of fifteen years poking around, cross referencing, trying this and that to come up with the simple, reliable map that PlaneTalk teaches, so you can save yourself a whole lot of time by getting it. You can also spare yourself the trouble of practicing countless scales and modes ... you won't be needing them once you understand the
PT mindset.
