saw the movie today at a free screening, it was pretty meh. Interesting for people who are into comp-sci/robots/AI/scifi, but poorly executed. Nothing really new in the movie, the human actors are all awfully written and one dimensional, and there are enough plot holes to drive a few squads of robocops through. Some pretty decent action scenes though, but all the science aspects are extremely bad.
I wouldn't bother seeing it at theaters, definitely one just to see at home when you are bored.
I hope the director does a better job with Aliens - I'm not sure which one was worse this or Elysium but its a pretty far downward spiral from District 9.