I have found this course very helpful in gaining control over the fundamentals and understanding how to utilize Unity and is definitely moving from a toy I was curious about to a viable tool which I can utilize in the future.
The course is helping me understand programming a little better. I have been studying python on and off for a while, which helps with the fundamentals. Variables and functions are not new, but Unity brings immediacy to learning a language. Perhaps that is because I have been involved with visual arts and design for a long long time. Building a program then seeing the results is for me one of the strong points to the course. All aspects of the course have supplied me with a solid understanding of how to use C# and Unity. Each section (with some repetition on my part) builds a better understanding of how to design and build something in Unity. (Shakes fist at Ben and Rick for making me do homework. 
…)
Thanks to Ben and Rick for bringing enthusiasm to the language and the game design.
SC