If the new React-Router v4 and its associated documentation are any indication, this course series will probably be good. I learned most of these concepts myself, through tons of trial and error, so the course is likely worth the time savings.<p>As an aside, I was one of the people that was really upset with react-router's churn. But v4 is really good, and I'm glad they've learned their lessons and put out a really good router implementation.