I think a lot of the information in this book is common sense from a sales perspective. However, I don't think many people are trained in sales, and thus this book becomes an invaluable resource for thinking like a salesman.
Before this book, I was doing some of these things naturally because my sales had progressed in such a way that clients naturally gravitated toward package deals and static prices. However, I hadn't put much thought into it and my prices were always based on the cost-plus model. After reading this book I feel well equipped to go on and value-price my work. I also feel like I have a better understanding of how to put together successful deals, and negotiate better sales.
A lot of this book is focused on the art of the deal, and it really pays off. In addition to the book, if you purchase the full course, there is an email worksheet schedule that follows up with you. This worksheet set has been a fun and interesting way to help you remember what to do and how to do it.
I'd also recommend buying the full-deluxe course because it comes with scripts and contracts that you can swipe and modify for your own uses. These contracts and scripts are things that Brennan would say or do, and are a very valuable insight into just how this new sales process works.
Finally, what you all really wanted to know: Yes, I've doubled my rate, and on some projects, tripled it, since using this book. It's not actually as hard as you'd think. The hardest part is talking the client into seeing the project from your point of view. After that, the rates fall into place. Without doing that, the client will think you're nuts.