I have to admit that I didn't spend enough time with it yet. But if you have the discipline to do it I guess you will get to know the fretboard pretty good. Furthermore I am still looking for THAT Chord-Fusion-Pentatonic-Scale-Blues-Rock etc. Book/Online Course...
There is so much stuff out there but most of it sounds corny in my ears at the end of the day. So I always come back to learn instead of that sections of Zappa Solos. I never reached the point to make a certain musical concept really work for me. OK, you can do a lot with the pentatonic scale. But there are for example book who teach you to use the pentatonic scale in a modal way. I understand the concept, but I can not say. that I reached any really good results with this approach.