I used this book along with the PMBOK. There are some topics in this books that weren't part of the PMBOK. Studying both these books helped me to pass the exam.

While this book has a number of useful questions, there are also a number of errors throughout the book both in the preparation materials and in the actual questions. I wouldn't start with this book.

I used this book and the PMBOK and passed on my first try with a 167/200.

pmstudy.com is another great resource and offers a free 200 question test

Happy studying!

This book is riddled with errors. In the first chapter alone there are 2 errors in the answer key for the self-test. And it gets worse as you go along.

In one example the question has 4 possible answers; A, B, C & D. The answer key says the correct answer is B and the incorrect answers are A, B & D.

In another example the correct answer is D and it lists the incorrect answers as B, C & D. (and in that case A & D are both correct).

I switched to PMP® Exam Prep, 4th Edition by Mulcahy and it is much better. This exam is difficult enough as it is without having to decipher the answer-key.

This is an excellent book that covers all aspects of PMP exam. But make sure you read this in conjuction with PMBOK. After reading each PMBOK chapter and I read the corresponding chapter in this book. The author has done a great job in explaining the concepts presented in PMBOK. You don't need any more study materials than these two books. Make sure to do all the practice tests. The practice tests with this book has some very good collection of questions. The questions on the final exam was interestingly on the very similar lines.
Addtion of few subjective questions at the end of each chapter may further help. As a matter of fact, I created a list of subjective questions of my own based on this book that really helped me solidify my concepts and during the last hours before the exam.
My final result 92.5% on PMP (185 out of 200); Here is the break up.
Intitating Project: 94%
Planning the Project: 91%
Executing the Project: 90%
Controlling the project: 93%
Closing the project: 100%
Professional Responsibility: 93%
Thanks
Sanjeev