It looks cool.
I already have a problem with the story line, it is a world/tech problem that cascades through the rest of the story line.
The availability of high power-density energy components ("free energy") for all the machine tech (police robots, aerospace craft, etc) causes a disconnect for me with regards to things like water shortages.
The few shots I have seen of Elysium (station) drive me to wonder about other things that clearly were not done, but easily could be, to improve life on Earth. Like GEO space-based solar power stations.
Now for my last complaint. I am worried that the movie will hurt advocacy for actual space colonization. The "common man," identifying with those Earthbound, will be influenced by the movie and will have their image of space travel, development, and colonization as a plaything of the privileged further reinforced. The idea that by developing space resources the global standard of living can be increased will be pushed further from their minds.