This book is very extensive in its coverage of the exam topics - sometimes a little too extensive if you've had any experience with JSPs etc - however better too much than too little.
The practice exams and CD are great for revision and the summarys and drills all help in refreshing the key points.
What lets this book down is the fact it seems to have been rushed. The diagrams are poor and serve to confuse rather than clarify processes. Similarly there are noticeable inaccuraces in the text and questions - in one case a full-page exam question is duplicated a few pages apart. Also some of the end questions refer to things not really covered in the main chapter, one example being server error codes.
On the whole this is a useful book for helping towards the exam but it would be a lot better if they took the time to polish it off, remove the mistakes and add some clear and concise diagrams to solidify the learning.