TL;DR; This is a good practical guide for learning Chinese. No matter what level you are at it has actionable advice, and links to good resources.
Long Review.
Between being an upper intermediate level speaker, and being a long time reader of his website, I did not think this book would have a lot of actionable advice for me, I bought it more as a show of support. I was dead wrong. There were many activities, and recourse that were completely new to me, and several that are helping me right now at my current level.
One thing I think that he does right, is address some of the big picture questions first, and then dives down into the subject matter tackling it one part a time. To many books and courses either focus completely on the method, or never get specific.
While he did the traditional bottom up view ( characters, words, and grammar), he also tackled studying in some other ways. For example, it is rarity to see a language book separate out all of the big 4 ( reading, writing, listening, and speaking) and really look deep at how to improve each one individually. This is where I really benefited from this book. I gained insights into how to better measure my abilities, and learned about new drills and resources to improve them.
Overall it was a good book. The only negative were from the writing style. These negatives are just my personal preference. The author can't please everyone.
The first was that he over used the statement "We will cover X later". You could find that many times in all the chapters but the last one, and in it there was the reverse of "We covered Y back in chapter Z."
The second was that he wrote somewhat like he does in his blog. Defensive. I understand it, and am ok with it in the blogs, but this is a book. There is no comment section here. Blog authors are always quantifying their statements, and adding in the exceptions, just in case. Very few are bold and direct, and don't worry about the overly vocal 1% that are going to get bent out of shape no matter what.
In conclusion if I know someone who wants to get serious about learning Chinese, I would recommend this book to them.