i apologise in advance; my reviews are not as detailed as others...
essentially this story is about the rise and fall of the shinsengumi. it's a historical action drama (with a supernatural element).
i much preferred this film version the the series. as 12 episodes had to be condensed into 95 minutes, the pacing is better, although the drawback is that there is less character development and some of the incidents that lead the characters to act as they do, such as when 2 members of the shinsengumi left, had to be glossed over. some of the wonderful humour of the first few episodes is missing also.
however, i feel that these losses are compensated for by some excellent sword fights, and most significantly, the portrayal of Chizuru here, in comparison to the series, is a breath of fresh air. no longer is she an annoying child who's talents extend to fainting and making tea. she is resourceful, smart, passionate, and a fighter. although we sadly don't get to see her fight here, they way she gets her sword out tells you that she means business.
the animation, as with the series is of a very good standard, very clear, very bright and fluid. the plot is easy to follow, if a little rushed. i am not sure the storytelling would be a completely satisfying experience if you have not watched the series first. however, i would recommend that any one who is a fan of samurai style anime to give this a try.