I finally saw this tonight and I personally enjoyed it, was it as good as D9? No, is the simple answer.
But Elysium had an identity of its own and the story was good, as were many of the characters, Damon as Max was good, as was Braga (who gets hotter every time I see her) as Frey. Foster was decent but was a little too hammy at times, and Sharlto Copley stole the show as Kruger, a darkly comic villain and up there as the one of the best villains of the year.
Blomkamps direction seemed a little off at times though, I thought his use of Shakey-cam and slow-motion was really over-used at times, and it was to the detriment of the movie at times as well. The movie wasnt as well paced as D9 either, there seemed to be a few too many slow moments were you just want the movie to move along and yet it lingers in a pointless place.
The action and special-effects were really well done, you couldnt tell when CGI was being used 99% of the time, and the way Blomkamp does futuristic weapons and their effects on humans is sublime, he literally has no equal in this regard.
Another problem I had was that Damon's journey seemed a little too similar to Wikus' in D9, both characters bordered on unlikeable for a long time in their movies only to have a change of heart in the 3rd act and do something for the cause rather than follow through on their selfish desires from earlier. I just thought it was handled better and in a more natural way in D9 than it was here.
I wonder because of the budget was the studio more involved this time, as Blomkamp just seemed more restrained than when he directed D9 for me. I just hope it doesnt change him as a film-maker as he has the potential to really go places as a director.
Overall I enjoyed Elysium a lot, with a bit of editing it would have flowed better but I came out of the movie satisfied and found myself enjoying it a lot. 8/10.