The content inside is amazing, and the perfect sort of complicated. Lots to digest if you just want to give yourself more work.
However, the font really is atrocious. I'm dyslexic and I spend a lot more time struggling to READ this document than I do actually absorbing the material. It's gotten to the point where I've opened my copy of the pdf into acrobat and have begun the process of converting the font to something more legiable myself. It's a massive undertaking but it's the only way I can reasonably read it.
So if you struggle with that, maybe take a pass. Otherwise, really really REALLY good content, I love all the charts and flavor!
[4 of 5 Stars!]