The Princeton Review is a great book for what it aims to do: provide you with a decent score on the SAT's. It does not, however, prepare you to do exceptionally well on the SAT's (and by that I mean 750+ in any given section). Basically, if your goal is to break 650 or maybe hit a 700, this book is perfect, and I am sure that if you use it properly, you might be able to nail a 700 in every section.
The Math prep is not at all comprehensive or in depth. They do a nice job of laying out basic concepts, but for the most part the strategies are poor. They have this thing called the "Joe Bloggs technique," which essentially says something to the effect of, "on easy questions the tempting answers are usually right, on medium questions the tempting answers are rarely right, and on hard questions the tempting answers are never right." They aggrandize this method beyond its actual ability, which isn't much from the start. They do have very useful techniques for percentages, ratios, and averages, but they never explain strategies to help you with the harder questions.
Critical Reading was their strongest section, between the Princeton Review methodology for passage analysis and their vocabulary list. However, there were slight drawbacks, namely the method they use for passage analysis is slightly hard to swallow at first. Once you get used to it, it becomes much simpler; however the first time you read through it and apply it, it may seem ineffective. The vocabulary section was very good, but if you want a higher score, you may need vocabulary supplements.
The Writing Section was abysmal. The review of grammatical concepts was nonexistent and the strategies for writing the Essays weren't really flushed out, and as a result you do not get a sense of what the essays are like or how to write one.
So again, if your aiming for a 650-700, this book will do the job. If you want to snag a higher score, I'd look somewhere els. I'd recommend looking as SliverTurtle's guide (just google it) if you intend to reach or break a 2100. He (or she; I have no idea who wrote it) talks about everything you may need for a high score on the SAT's.
Oh and good luck!
