The book is short, and if you remove the excessive repetition, it would be less than a ten page article. From that perspective the book is worth one star, or 99 cents. I couldn't believe I paid $9.95 for it (I bought the Kindle version; the printed book is even more expensive for such a brief content).
However, the Dan Sullivan Question explained in the book is a gem for personal and professional development. From that perspective it is worth $999 or more.
It's a mixed feeling. So don't treat it as a book, or you will be very disappointed. Treat is as a business advice, and you will find it to be one of the best advice you've ever needed and regard the excessive repetition as reinforcement to get the advice sunk in to your brain.
The irony is, I have to read this excessively repetitive book a few more time because the advice is so valuable and I want to master it.