To all of you who might be wondering if it is worth it, it definltely is. I am now on the "Blues" segment of Guitar Tricks, since I began with Guitar tricks on June, 2015...and trust me, investing time on fundamentals 1 and 2 by Lisa is REALLY REALLY REALLY going to help you, because this guy goes fast. I think I got badly used to her style, but for a good reason: She explains very well and for the first time in my multiple attempts at guitar learning, with her I really understood things. I am kind of methodical and the usual "learn these chords by memory" approach was never good. But with her I have really learned a lot and mainly understood the fundamentals of the various themes she teaches.

So in summary, really take advantage of Guitar Fundamentals 1 and 2 with Lisa McCormick, you will definitely understand it when you finish her courses.