If we consider ourselves as "quite" serious movie reviewers, we must acknowledge the fact that a movie tells a story - that's what it's supposed to do.
Just like action movies - dance movies traditionally run short of a story to make room for the action, uhm, dancing. This is an important background fact to review this movie.
I also have to admit that I don't really like dance movies - I never saw the necessity to push a story with dancing scenes - Indian movies rely heavily on it and even in western movies some productions have reached the point where the story is, well, the gap filler between the dancing. And that would rather make for a "performance flick" than an actual movie.
Luc Besson tries really hard to makes this one stand out. He gives the protagonist characteristics that make her very special. He adds characters that really try to propel a story. The settings are great, the sound is mostly awesome and avantgardly cool, the camera and editing is (of course) Bessonesque deluxe - so what's there to complain?
Let's jump back to the beginning of my review. Even though there is a lot of substance compared to other dance movies - in the end it's a dance movie and the crucial part is the final performance, like in any other dance movie. And that, unfortunately, makes it very predictable and prototypical.
It makes me a little bit sad as you can tell that everybody here is working so hard to make this movie stand out as something different. As a performance flick this is probably one of the best and most original I've seen - but unfortunately as a movie it's only average.