I am a amateur classical guitarist and bought the book on recommendations of others to deal with performance anxieties. While I am not a fan of self help books, this book does resonate with me and I am finding the discussion and suggestions interesting and useful.
I am about one third of the way through. The book has exercises for musicians and singers to perform, so giving it a hurried read will not deliver full benefits. I also think that multiple reads and practices will also be beneficial, as there a number of ideas that are new to someone not familiar with self-help language.
My one criticism, which is responsible for my 4 rather than 5 star rating, it the book's presentation. It is fairly small (5 1/2 by 8 inches)and has a traditional binding. Now, you are supposed to use this book during exercises when you are playing your instrument. How in the world are you supposed to keep it open on the music stand? I have resorted to a large clip and a lot of bending back the binding. The book should be larger and in spiral binding, and I would have paid more for such.