Here is an honest review of the book for what it is, not the ethical and educational implications of reading this book. In terms of the educational value received from the book, it's not too bad. Although their vocabulary isn't as great as the vocabular sparknotes employs, their guides seem to colloquially explain the subject material, which is the purpose of the book. I bought the book because I was at Target and needed a guide for an upcomming test where I wouldn't have internet access the nights before (I usually use sparknotes because it's free), and I was surprised by the writing quality of the book. Granted, it's not as good as Fitzgeral's writing, however it does relate the story, which is the primary purpose for a history class.
Concerning the people who have condemned this book, they need to understand the multiple approaches to learning subject areas. Currently I maintain a schedule where on good days I receive 6 hours of sleep and on bad a receive 3 to none because of my busy schedule and heavy extra-cirricular activity. Reading cliff-notes doesn't mean we as readers won't look in the book for quotes (for example - writing a paper) to support our ideas. Simply condemning them because they're not the real book is unfair to the book, the authors, and the people that use cliff notes for ligitimate purposes. Overall, it conveys the idea well, however sparknotes does an equally decent job.