This was a very enjoyable, readable book and a good introduction to someone new to the topic. If this particular subject is old hat to you, you won't find much new in the book. But for someone just developing an interest in WWII armored combat and the development of Germany's Panzer forces, this book makes a good starting point. It is easily readable, which isn't always the case for military history, and that is an extremely important point for a survey type work like this.
Cawthorne zeros in on the two most prominent figures in the development of Germany's armored warfare doctrines, Guderian and Rommel; others are mentioned in passing, but these two are the stars of the show. The author does a good job of outlining the development of the Panzer forces and some of the difficulties Guderian experienced in getting them established. Overall the book does a good job tracing the arc of the Panzerwaffe from its establishment, to its peak, and finally its death.