Has anyone here ever followed this?
The general idea is too eat in a similar way to our ancestors before farming was discovered ... so as "natural" as possible, avoiding grains, starches and factory produced foods and only eating food that's in line with our evolution - it generally presumes that prehistoric man ate far less meat than most people think he did, with more emphasis on gathering/scavenging than on hunting.
I've been following it on and off for the last few years - even as a veggie - and found it to be the most beneficial diet for attaining good health ... the stricter I am, the healthier I am - and when I get lazy I notice old issues creeping back (such as excema, weight gain and lack of energy).
Recently I got back into it after a long break and managed to shed 32lb in 10 weeks. My own downfall is that I often end up cheating every few weeks out of boredom and social temptation.