This book is great resource on Mage's the ultimate adversary (or any game line, really) and a great (if completely stomach-churning) glimpse of True Evil(tm).
Mechanics are kept to an easy to use and reference utility without being all crunch all the time.
If I have one complaint, and it's a major sticking point, it's that the authors allowed themselves to inject their real world political views into a game about
escape-ism. If they could have kept their real world politics out of my happy fun time game (well, not-so-happy-fun-time, considering this book's material topic
that is presented here, it's very heavy AF) that'd be great.
Page 96's 3rd paragraph's unwarranted insulting reference to a certain real world US president is and especially bad take.
I read/play mage to escape, not get slapped in the face with a cringe-worthy bad take about real world political opinions.
Had the authors managed to keep their IRL opinions about certain IRL people out of the book, I would have given it another star or two.
Otherwise, a great book damaged by unasked for outside opinions.