Book focuses on options on futures which is good as most texts focus on stock options. So if you're looking for something about stock options, this isn't for you although the techniques, in theory, can be applied to any underlying.
My main criticism with the book has to do with the fact that its central premise, selling of options, is not discussed in sufficient detail, or at least won't explain the clear gap between the book's thesis and reality.
The idea to sell far out of the money options with long durations is a good idea in principle. However, finding a market which has sufficient premium at 75-100% OTM in ANY month, no matter how far out you go, is nearly impossible, inspite of the author's claims.
I have tried to raise a number of issues/questions I have had about the book and it's recommended techniques with the authors directly, wondering if I was missing something. They have not honored me with an answer.
The authors try to avoid advertising their brokerage business but I couldn't help but think that in addition to lacking real substance, this book was more of a vehicle to get people interested in becoming their clients. Given that they claim to run a business managing 100s of accounts using the book's advertised method, I cannot help but wonder what they're NOT telling the reader. Their unwillingness to answer more specific questions probably means they want you to become their client first.
In short, don't buy this book if you really want to learn a practical approach to options trading. Instead, I would recommend David Caplan's classic The New Options Advantage.