It's a great movie, even for a person who's not much into the history. Makes one think about political and social processes that one witnesses today, and reasons behind global decisions that are often hidden.

Rufus Sewell is excellent as Charles, royal but still very human, which just makes you feel an affection for the person he portrays. Rupert Graves is extremely convincing as Buckingham. The movie has an excellent pace, a very appropriate one for a historical drama, and never boring, which is (honestly) a rare thing to find in the genre. Also, makes you want to dig into the history of the period, which I did.

Overall, very much worth seeing.