What did I think?
It's easy to overlook the "acting" aspect of Animation when you are just starting out. Even though it is the most important part! Your head is filled with the principles and all of the ideas for amazing animations you want to create. But do yourself a favour and pick this book up (even though your not a beginner). Hooks gives some great insight in what acting is and it will help you when you are planning out your shots and getting into the head of your characters.
Do I recommend this? Yes!