To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzes reviews to verify trustworthiness.
This book does actually prove what it claims to be in its introduction- a life changing read. I most certainly have understood the fundamentals of verbal, and commend on the structure of pop up quizzes and drills drawn at the end of each topic.
This book covers all the fundamentals needed to get a good score on the Verbal section of the GMAT test. A good general prep is given, but specific question types are not entirely covered in the book (but they are available in the other Manhattan Prep books).