When I set out to create Secrets of Texas Blues Guitar, I wanted to address the many areas that some of the guitar instructional products I've purchased and used for myself were lacking in.
One of the many aspects I noticed that wasn't being addressed was the benefits of practice; not only that, but how to practice effectively.
(Here's a great Easter Egg for those of you who've gotten this far: I've included a special BONUS Article in the course entitled "The Three P's of Playing Guitar" which covers the benefits of practicing the right way!)
Another issue I found, this one in many of the students I've taught, was not understanding how to apply the scales they had learned or already knew. In Secrets of Texas Blues Guitar I wanted to teach guitarists how to create their own "signature" licks from scratch based on these scales.
There are plenty of other issues I could list, but the reasons above should give you a good idea of why I saw the need to create yet another guitar course.