Has this book helped my game? Yes and no. I already believed that my short game was the key to scoring better, so a lot of the book made sense to me. I did buy an additional 3 wedges just as the book recommends. I am also using the chipping technique/style outlined in the book with great success. However, I have not come close to following all of the recommendations in the book. Some of them will be hard because I don't have access to an area where I can accurately measure yardage with my wedges. That's the only downside to the book. Some of the techniques are beyond the average golfer, or require more time and resources than is practical. That's probably not the books fault though.
For me, this book is a long term guide. It is thorough enough to help the really low handicappers in nauseating detail. For now, I can only take advantage of some of the recommendations. As I get better over the years, I expect to keep going back to the book to find new ways to lower my score.