Like all good science Fiction, District 9 does a wonderful job of crafting the current issues with explosions and goo to make entertainment that when you sit and think, tells you something of the human condition. Yes, it could be a buddy movie and yes it could have been pure guts and guns, but setting the aliens within the confines of what was once the most repressive segregated cultures in the modern world, it help high light man's on ability to cause harm to those around them when the 'dehumanize' them.
The Other Half and I went at the matinee and I was surprised that she enjoyed the movie as much as I did. Some of the Boom! and Splat! might have turned her off, but the other items held her to the story. That is good science fiction, when you can get past those window dressings and enjoy the story, regardless of the trappings.
My hope is that they leave the setting with all the delightful questions that the show left open and not be tempted by box office success to create a District 10, Revenge of the Prawns! Please, please, please...
As for a rating, I would give it 3.75 alien tentacle fingers out of 4. Good job Mr. Blomkamp, keep up the good work.
but you are, please sit down.