I haven't played the game yet, but this movie made me want to. The story itself wasn't that special. But the action in the movie was absolutely the best. No movie, anime, Tv series has better fights than this. After watching this movie, I could never bring myself to like any action-based anime like DBZ, Naruto or Bleach. Why? Because it was all about action and the action SUCKED. I've rarely found fights that could compare. Almost all the time they are turn-based, only one person attacking at a time, or it ends up being a cluster fuck of power-ups.
The animation was awesome. This is SE after all. And the characters were diverse. I loved their designs, especially Vincent's. Music is, just like any other final fantasy game, impressive.
In conclusion this is a really fun movie. The action itself would get a 100 out of 10
Overall I'd give this a 10/10
