Not exactly, but the coursework is worthwhile. It's well designed so that you get to only focus on the topic at hand, not setup or scaffolding of any sort. You

Not exactly, but the coursework is worthwhile. It's well designed so that you get to only focus on the topic at hand, not setup or scaffolding of any sort. You really get a feel for how to turn an equation into vectorized code, which the video lessons can't give you. I've completed the first Ng course, the later five-course specialization, and a few other courses (Odersky's Scala course among them). Still, 4% doesn't sound unreasonable: I too have enrolled in more courses than I completed.