The story is intriguing, and the voice acting sounds pretty good. I'm not a big fan of the animation, though. Whenever they use CG still like this with Anime style, it looks like a video game cutscene from a GameCube game or something. I'd like it if I were playing a game, but it doesn't really work for me as a feature film.
Also, sadly, there is at least one "Uh" in the trailer, even in English.