Each book is specialized in a certain area of contents. For instance, a complete book is dedicated to algebra. Another covers quantitative comparison and data interpretation. Within each book, concepts are broken up into chapters. Before moving on to a new concept/chapter, you can test your newfound skills with plenty of relevant practice questions. Other prep companies treat most concepts superficially and provide few pertinent practice problems.
Because Manhattan GRE is spread across a series of books, each book does not feel cluttered. While this may sound trivial, having to stare at an unruly forest of facts and figures can quickly drive one batty.
Finally, the end of each book has easy, medium, and difficult practice sets, consisting of the different revised GRE question types. By the time you get to the end of each book, you will have been exposed to the range of concepts tested on the Revised GRE, and been given ample opportunity to practice.
With these books you will actually learn. Manhattan GRE does not resort to cheesy gimmicks or “tricks.” You will have a solid grasp of the fundamentals. The books also do not lull you into a false sense of complacency by dumbing down the test.
The voice used throughout the series is direct and engaging. Explanations are also clear and will probably not leave you scratching your head, the way you might after reading other prep books. Basically, you feel like you are working with a smart, patient tutor.
While I’ve already mentioned this a few times, I want to point out that Barron’s, Kaplan, and Princeton Review do not cover every concept and only cursorily cover many important concepts. The Manhattan GRE series covers almost anything you will see quant-wise on the test (I noticed that parabolas – an uncommon question type seen only on harder questions – were absent).