A friend recommended this book, and I'm very grateful as that could be a book of the year for me. The book talks about value measurement, games, and the philosophy behind it. I got multiple interesting perspectives for myself.
Inability to measure things that matter and sliding to focusing only on things that can be measured are well too familiar to me. It's a common dilemma when you'd like to measure the productivity/quality of a software engineer. After my 15-year career, I'm yet to see any good measure. This book reminded me of Measure What Matters, which is only about OKRs process.
As for the criticism, the book is too long and quite repetitive. Its value is significantly lower because of it. Also, Part 4 felt like missing a strong point in each chapter.