I'm going to defend Leigh a little here. She's actually pretty smart, and her e-books are very good. I bought them a while back (and although there was nothing earth shattering in them) they can be helpful to some people who don't have a clue where to start. From another board I hang out on, there have been a lot of people who do well with her stuff. In fact, I've been tempted a couple of times to suggest her metabolic repair program for people who seem to maintain on some pretty low calories. That program takes people through a very specific number of steps to raise their maintenance calories. Although, eventually I tell myself that it's none of my business and keep my mouth shut.
Having said that, I agree that there's nothing 'new' in her stuff. And you can learn probably as much doing your own research. Leigh's work is not a 'eat this and you'll drop a pound a day' kind of thing. She's all about working smarter, not harder. And although I've avoided it for a while, I'll probably do her 12-week OPT program starting Monday. It's a 'ready made' program that came with the package. I'll complain and whine about it (since I don't like some of the macro suggestions, and I'm not sure I'm a foam roller kind of gal). However, I'm a little burnt out with my diet, and have pretty much maxed out some of my lifts working on my own.
What I can say that I took from her writing is the concept of a diet break every so often. Think of it as a physical and/or mental break, letting your body recover and to gain energy for the next round. I'm not sure if that's why, but I've managed to keep my calories quite high and still continue to lose weight. Well, except for the last couple of weeks when I just haven't been into it. So, I'll take a little more structure and try her program for 3 months. What have I got to lose? Well, more weight of course.