The text did manage to get me through the exam, but I'd definately recommend taking some time to play around with the technologies it mentions or you're going to flounder a little over some of the exam questions.
One point of not is that this book, and the App Development Foundation (70-536), are riddled with errors in formatting, grammar and in some instances spelling. If you are fresh to the subject you can't pass the exam with this book alone but people with some experience should be able to muddle through after a couple of reads of the book and some time playing with the technology.