Loved it. What a flick, and to be honest, a surprise.
D9 was poignant, ballsy (seriously, doing a movie about even alien segregation based in South Africa, with its history of apartheid is pretty gutsy), seemed more anchored to reality than most scifi, plus it had some really good action.
As an aside, even the name is smart: District 9 is no doubt a reference to District 6 near Cape Town, that saw forced relocation in the '70s. My only criticism was that the first 30 minutes was too vague of a narrative, and the viewer probably was a bit detached. But damn, the film does a fine job drawing you in when the time comes!
9/10