I guess there's 2 ways to look at this.
Good way - more or less keto diet with allowance for "good carbs" to make it more palatible for the masses. Do a nice job of dispelling the obvious anti-fat myths like eggs are bad. Does a nice job of talking about some specific tough foods, ice cream etc... explianing what they do in your body. Very anecdotle for people who would find, say Ellis' style, too science. Full menus for thoses who like that.
Bad way - prone to failure. Once people get past the point where their following the menus to the T, they will start to do "their own" version and gain the weight back. It's a more forgiving diet which means you have less room to fall before it stops working. If after a month of Ellis or Atkins you decide you must have whole wheat toast in the morning and a few fries with your burger your still ok. If your already eating whole wheat toast, and an apple and yougart -your'e done.
No reason to even look at this one if you've read Ellis and/or Atkins.