Having - almost - completed the Lawyer Course in STH’s Academy, I have to say that it’s well worth it. Elsewhere, someone’s pointed out that really Source is just a couple of stacks - Grid and Container - but they’re so deceptively powerful that I really wouldn’t have understood what was possible without working through the examples on the course and then having my steps confirmed (or otherwise - hah!) by the video walkthroughs that follow each part of the course.
Hats off to Stuart, not only for producing Source in the first place, but also for supporting it with such excellent training material. Heartily recommended.