I have it... read it twice.
You learn every responsibility you have in every sort of situation (even if the text is sometimes repetitive from chapter to chapter, but hey, its not a novel!)
In fact, I kept it my car during the season so as soon as I got the door closed and the A/C on I could look something up if I wished (not always because it happened during my game, but because it COULD have)
If you want to learn how to work as a crew in non FED mechanics, get it.
If you are one of these FED guys who still covers 3rd on a triple and wants all coverage of line drives in the infield as PU, you may be less then thrilled