An interesting movie that tried really hard to get away from the mythology and simply tell the story of the king, historically. Some great choices were made - Lancelot and Guinevere's muted romance, for example - and the thin ice scene made the movie at least worth watching.
It was visible, though, that as good as Clive Owen is, he withered a little under his direction... Fuqua makes decent movies with great vision, and gets great budgets, but some really good actors are terribly unimpressive under his (Denzel Washington's affirmative-action Oscar over Academy thorn-in-the-side Russell Crowe comes to mind, as does Bruce Willis in Tears of the Sun, though B.W. was much better).
Unfortunately, by making the story as relatively unremarkable as it likely is, the film too becomes unremarkable, and the ending struck me as a "well, here's as good as anywhere sort of moment," though it too makes more sense considering the subject matter. A 3-star flick, and the extra half is for promoting historical debate and not completely copping out and going Hollywood with arguably the most mythologized history this side of the Bible.