Whats the f plan diet all about?

is it any good what sort of weight can you expect to lose on it compared to other diets can you do exercise to a high level on it obviously its eating alot of fibre but surely not all bran all day long can someone explain a typical day on it and how much of whatever you can eat for example can you eat meats if so what ones and how much of em pasta/ potatos e.t.c any information would help really b4 i waste my money buying the book to find its no good for me thanks