I just saw it. It was a good movie, but very science fiction. If you go hrthinking it will be an action movie where Lucy goes on a shooting rampage you will not be satisfied. This movie reminds me in a lot of ways of "old scifi" where they used abstract images to show things happening.
It had its flaws, it tried to paint a false picture of humans only using 10% (which has been shown to not be true) of their brains and what would happen if more is use. If you can suffer through the "lecture" on what happens when people use more than 10% it is pretty good.
This is definitely a movie for the scifi fan and not the action movie fan.