I have heard Lustig interviewed before on Jimmy Moore's low-carb podcast and by Alec Baldwin. I find him to be very credible. I found the writing style very informative and engaging, and I thought JT Ross was a very good narrator...striking just the right tone for the book overall...however, his mispronunciation of the word "satiety" (just Google it for the correct pronunciation) was pretty distracting, as the word occurs often. Of course, we all bring our preconceptions to a book when we read it, and I was really hoping for more practical advice on "what to eat" than I ended up with. Yes, the essential information is there...but it would have been much more helpful to me personally if there had been a section along the lines of "here are sample menus which would be supported by Lustig's presentation of science". It might be that it came across better in reading the book visually...but I didn't pick up much of that here. I think people writing for this subject often don't realize that many of us just "don't speak the language of food" and really need someone to "paint a picture" for us. I must say I did feel like he really did a tremendous job of busting stereotypes and explaining both why we are where we are with the obesity epidemic and how best to proceed as a society. I liked the way he went thru all the popular diets and explained both their strengths and weaknesses. So I found the book quite enjoyable overall and wouldn't hesitate to recommend it to people who are looking to get their bearings on the myriad of varying opinions about diet and exercise.