Please note that I am taking the test on Friday, and cannot yet compare this book to the exam. I would like to review this book in light of all the study materials I have worked with. I must say that you NEED to do practice tests, which this book offers. If you are an experienced project manager, you will be tempted to answer many questions on common-sense or best practice in your own environment. You may also not realize what you need to study, because it may seem as if you know something like the back of your hand (say, Quality), but you do not know what the PMP exam expects you to memorize (like the names of people who invented quality techniques). That was me before I started taking practice exams - thinking I really knew this stuff because I do it day in and day out. It was the practice exams and answer keys that helped me with the trick questions, the question formats and answers designed to trip you up, and all the times where common-sense doesn't equal the correct answer.
I had another test preparation book, that had its own exams on CD. While I loved the CD format, their explanations of right and wrong answers didn't come close to PMP Practice Makes Perfect. I also exhausted the questions in an online learning "TestPrep" I had access to, and took several free exams online.
Over time, I kept track of my scores. I was at a steady plateau with scores averaging around 67%, not passing scores I am sure!
Over this week, I have taken a practice exam every night from this book. Both nights, I scored myself, and noted questions where I wanted to read the answers to regardless of my score, as well as any other potential answers. Then, I read the answer key, understanding why my answers were right or wrong. The next day, I took another practice day and my score went up by 13%, from 71% to 84%! I am confident that if I continue testing myself through this last week before the exam, I will be able to pass.
The only question I have is that the practice exams differ significantly from each other. The first one I took had many earned value calculations and critical path analyses. The second one had none. If you buy this book, be sure to take multiple practice tests to get experience with the different types of questions you may encounter.
Another thing to note with the tests is that they do not simulate reality in that the questions are grouped, meaning that you can infer some answers from previous or future questions more easily. I am pretty sure that the real test will not group questions about like topics together. It is helpful however if you only need to test yourself in certain areas.
Overall, taking a test on paper with a paper answer key isn't similar to the experience in the testing center, nor is it easy. I would have given this book 5 stars if the practice exams were included on a DVD. note you can download an answer key on PDF from the book's website if you wish.
Overall, I would say that this book is indispensable especially if you do not have access to other exam practice sessions. But even if you do, this book may have more challenging questions and possibly be more up to date as its whole purpose is to be an accurate exam prep.