Yes, absolutely, I took it this year and it helps me a lot.
There is also the book "A mind for number"[1] by Barbara Oakley the course author with a little more content if you prefer.
Yes! I did it around the beginning of 2016. Anyone can use the techniques, and habits they talk about.
One thing they imparted was that frequent testing is better for learning than repeated reviewing. This caused me to put more emphasis on testing tools and spend less time on reviewing.
For example with vocabulary in language learning rather than review my textbook, I use an SRS like Memrise to test me, incrementally every day.
It also helped me realize how much structure, or behind the scenes help we loose when we leave an environment like university. I would say at the very least it will help you shore up some gaps in your personal learning style.
Yes, I think so. I took this course while studying the last of a five-year engineering program. The mental tools are still really useful, and not something I have encountered through the 'regular' courses given at our local university.
