I didn't like the book, because it's clearly not usable to prepare for the exam. It covers the syllabus' topics, but does not concentrate to the material enough. It's nothing about the tricky questions or the important points of the material I need to know. It's about the author's stories, experience and advertises of his company. It's OK, now I see that he is a leading specialist of the area, and he has all the rights to market his company and services, but the book is just unusable to be prepared for the exam.
For example if there are four methods to improve the testing process, the author details only that one which was written by him, and only mentiones a little the others. For the exam I would need the details about all of them, all the key points and the differences - not the author's opinion about which was useful to him in his projects.
So I appreciate his knowledge, but disappointed, because it's more about him, not about the exam.