I bought this course, because I was already familiar with David's work after purchasing the Boss DR-880 tutorial. The Zoom R24/8 tutorial follows the same guidelines, Simple, easy to understand explanations. David goes about this in a methodical way, pointing out all the important things, as well as those that are not in the manual. I like the shortcuts, and hidden features he uncovers. You won’t find anything this in depth on YouTube. More than worth what he charges. Also David is very quick to answer any questions, and takes suggestions. These tutorials are time and money well spent.