The Official Guide for GMAT Review, 11th Edition

I love this book. People are saying that the questions in this one and the verbal and math supplements books are the same so I went to Barnes and compared the reading comp sections and all passages were different. So...I don't know if they're comparing with the 10th edition or they're on something. If you're studying for the GMAT, at least get this book. It has a gang of questions from actual exams which is great for the verbal section because I would think verbal questions are harder to mimic than math questions.

AT LEAST PURCHASE THIS BOOK OR THE SUPPLEMENTS.

Manhattan books seem good too. I'll be ordering them within this month.

This book stinks. It has a VERY limited review of the concepts covered in the math section of the GMAT and absolutely no strategies on how to get a high score on the test.

If you're rusty in high school level math, you're going need a serious review, which this book does not provide.

This book is mearly a catelog of old GMAT questions for the user to practice with.

I went through this book, the Kaplan book, and the Princeton Review. This is by far the best of the 3. It has the most review questions and doesn't try to teach you any garbage strategies, just how to do the questions. The one shortfall is that the answer explanations are sometimes not in depth enough.

I just want to give some advice before you buy the book.
First, The problems are way too easy compared to Kaplan. I bought Kaplan Before buying this review, and the problems overall are way harder in Kaplan.

Second, If you don't know what the GMAT is all about, I highly recommend the Official Guide. After you finish this book go on an do Kaplan, and I will guarantee you a good score in your GMAT.

Having spent 30 minutes studying out of the Math review section, I found considerable errors similar to others who posted. I've found 7 in 20 pages. Come on.
The errors go beyond having "x2" instead of x^2. The errors go to basic concepts that if a trusting reader were to follow, the test-taker would be in trouble. Sometimes the diagrams don't match the word descriptions. In the review of coordinate geometry, the equations given and the graph representation are way off. If you don't have your high school notes handy or are a little more than rusty, this could hurt you.
While I'm sure the rest of the book is helpful, I am giving this 1-star because it smacks of laziness and it's kind of insulting. It's troubling to think that these mistakes are acceptable for an organization that administers a major graduate admissions test. We wouldn't get into B-schools with errors like these.
To the GMAC: take notes from the LSAC, and leave the test review to the pros.