Intelligent, witty. Synthesis of an updated 2001: A Space Odyssey with a decent action/adventure picture. Perhaps unnecessarily violent, but that was probably planned to pull in the younger crowd. Johansson is perfect in this.
If you like Sci-Fi and Scarlett, go see it just for fun. If you liked the movie "Limitless"(clear pills that made a person access all of their brain capacity), you will probably like this, although Limitless was a much better movie.