I just finished reading through the book and I'm very excited to give it a try. Not only for playing solo games, but also as a gm-ing tool at the table. The process and advice presented in the book are very well presented.
Like all products, it's not perfect. I docked it one star due to the illustrations of scantily clad women throughout the text that have nothing to do with the book's text. Perhaps they are supposed to be adventures, I don't know. I found them distracting and lacking inspiration. There's no action in the art, just cheese cake.
[4 of 5 Stars!]