The drills in this book, like those in all of Michael Beale's books, are well laid out and easy to understand. I feel they are a bit complex for under-7 & 8 age groups, or for coaches that have not yet obtained their level 1 badge, but I recommend this book to any coach of level 1 or higher, who is coaching players of under-9 or older.
A great partner to this book which I also recommend is Michael Beale's "The Soccer Academy: 140 Overload Games and Finishing Practices".
Want to know a book to avoid ? - "101 Great Youth Soccer Drills: Skills and Drills for Better Fundamental Play" by Robert Koger. The drills are really confusing, even to more experienced coaches than myself that I've shown them to.