For background on this review, I have been Orthodox for 15 years. I have a Catholic background, am greatly appreciative of the liturgy and the devotions that I observed growing up, and if I were not Orthodox, would probably be Catholic.
However, there are theological reasons that I am not Catholic, and this book summarizes them very well. Unfortunately, this book is also written as much more of a rant than a catechism, has a terribly off-putting tone, and is just poorly written and edited. If I were exploring Orthodoxy and came across this book, I would run from instead of run to the church.
Although, I would like to say that the author has included several very interesting source texts that I greatly appreciated reading, and did find value in them. I'd recommend, however, getting your knowledge from the works cited, and not from this book.