Just watched the film, so...
I came onto IMDB to try and find some sensible topics about the film and find out how much of the film was valid, but found myself having to scour through numerous posts by obvious Leeds United fans spitting their dummies out about the film.
I'm sure there were less complaints about the novel it's based on because it takes longer than 90 minutes (an average football fan's attention span) to read a whole book.
Anyway, what an excellent performance by Sheen and Spall, et al. Definitely worth a watch, as long as you understand the source material, or aren't all that bothered about the football and just want to watch a compelling piece of film.