It's fun and informative I've read books, looked at open sources, and looked at many lectures, but there's no lecture as good as this one. First, the theory provides concepts, and if you follow along through practice, you'll get a sense of 'this is what app development is like'. Of course, there are times when the lectures seem unedited and unorganized, but they teach you step by step how to think and approach things from a developer's perspective. The best part is that the instructor feels really friendly, which makes it even more fun.