I really like it. I mean, strangely enough I was pretty much on it before I read any of the articles or books. It's very simple, you don't have a ton of rules and other BS that you're just going to break anyway. It's very similar in concept to the "un-diet" in the Body by God book. Most of it is all about eating naturally and exercising. I don't mean in an organic kind of way, but totally free of garbage, trans fats, things like that. Basically the same idea of "eating clean" that bodybuilders have talked about for years.
When I started following these concepts, the fat just absolutely melted off, I got a 6-pack pretty quickly, was cut more than I had ever been in my life, and my running and biking times were the fastest ever. I did this without counting much of anything. I counted protein but just kind of sloppily, I wasn't militant about it at all and didn't even do it regularly. So, basically, in my opinion, it's very premature for somebody to dismiss it as "not much of a diet"... when in reality, it works, and it's all the diet that alot of (of not most) people need.
In short, it's an entire lifestyle change, you can eat like this for the rest of your life. Most other "diets" cannot offer this.
Their new thing is the "TNT diet". Very similar, but more structured, especially in the exercise department. They haven't really been marketing the abs diet stuff anymore.