I like most things about this book; the physics and physiological part connected to Wing Chun and the use of the wooden dummy, the construction guide, the pictures and the describing text, the parallel applied use (with a human opponent) descriptions of all techniques. It is definitely good enough for you to learn using the wooden dummy from scratch, or to improve your present skills if already accustomed to it.
There are two things though I would like to see improved in this book:
1. The same standardized order of the pictures. In the formal wooden dummy sequences the order is of one kind, and in the applied sequences it's often another kind. This is unnecessarily confusing (even if the odd order is noted), although a minor problem after a couple of hours reading.
2. There should be pictures from above the dummy, so that certain details would be revealed that are impossible to note with help of the one angle used. This is especially important for beginners who might not be aware of certain grips, forearm turns, hand positioning and other details that are hidden by body parts of either the instructor or the dummy. In such cases supplement pictures would clarify things.
Still, even considering these two issues, this book is a really good help in learning how to use the wooden dummy in your training to improve your Wing Chun skills.