I started listening to a set of lectures on the Arthur legend a couple of weeks ago and decided it was time to watch this movie, which at least gets the setting of the Arthur legend right, although it may go overboard extrapolating the existence of his knights as cavalry from Sarmatia from the fairly recent discovery of some Sarmatian grave goods in Britain (Sarmatia is way the hell across Europe from Britain - somewhere around the Black Sea, I think).
Anyway, a not very interesting story. Looks great but it was hard to follow who and what was going on, and in the end felt a lot like a TV movie.