Customer Rating: Average rating of 4/5Average rating of 4/5Average rating of 4/5Average rating of 4/5Average rating of 4/5
Summary: Nice Math Refresher
Comment: I think this is a good book to go through before you jump into the official exam books. I really liked the Geometry section since that was where I was feeling the pinch when I started looking at the GMAT books. However I think you would get away by not doing the Algebra & Arithmetic since they were pretty simple.

Customer Rating: Average rating of 1/5Average rating of 1/5Average rating of 1/5Average rating of 1/5Average rating of 1/5
Summary: Far too basic
Comment:
I bought this book based on amazon reviewers comments and I was wrong. This book is so simple it's not even funny. Just skimming through it, I can not even say that it will help with the GMAT in the slightest way.

For a far better math review guide for gmat preparation, I would reccommend the Arco Gmat/GRE Math review book. This book assumes you know how to add and multiply (unlike the "Ultimate" refresher) and goes through topics in great detail. I am almost done with the entire Arco book and love how it introduces new topis and gives you problems that range in difficulty - from easy to hard. This is how you build up a mathematical skillset.

Not to mention, the Arco book covers the bredth of math-related topics which are likely to appear on the GMAT.

Anyone looking to get a serious score, steer clear of this waste of $. Your $ is better spent on the Arco book.

Customer Rating: Average rating of 3/5Average rating of 3/5Average rating of 3/5Average rating of 3/5Average rating of 3/5
Summary: A little too basic....
Comment: It gives an okay overview of the basics, but it is not challenging enough for the GRE.

Customer Rating: Average rating of 4/5Average rating of 4/5Average rating of 4/5Average rating of 4/5Average rating of 4/5
Summary: One of my favorites
Comment: This book starts you off with very basic math, building up to the more complicated mathematics that are included in the GRE (geometry, arithmetics, up to logorithms, etc.). Step by step, you fill the exercises right in the book. Simple and very useful. Helped me out a lot personally

Customer Rating: Average rating of 1/5Average rating of 1/5Average rating of 1/5Average rating of 1/5Average rating of 1/5
Summary: Its Very Basic Book, though it says refresher for GRE etc.
Comment: Its Very Basic Book, though it says refresher for GRE etc. It starts with 2+3=5 and continues with only very very basic details with the most complex formula in the book being "Area of Circle=Pi*r**2".