Considering its limited resources, this is a commendable production. I don’t generally care for movies centered on extraterrestrials, so it wasn’t automatically something I’d enjoy. Still, I decided to see it and recognize the positive aspects. Director Neill Blomkamp has delivered an intelligent film with impressive technical execution, despite not having a huge budget or backing from a major studio. I was particularly struck by the film's technical qualities: the cinematography is remarkable, featuring striking lighting and color palettes. The special effects and CGI are very well done, demonstrating that substantial funds aren’t essential for achieving quality results. The spacecraft design is unusual, the aliens appear believable with an odd but detailed aesthetic, and their vocalizations are both expressive and mysterious. A significant portion of the movie was shot on location in a real South African slum, which highlights the stark reality of living conditions some people face. The director chose to feature lesser-known performers, adding authenticity to the characters presented. Sharlto Copley is probably the most familiar face among them, having appeared in more mainstream projects. In this film, he delivers a solid performance with few shortcomings... although one significant issue isn't his fault but stems from the script itself. The name given to his character, Wicus van de Merwe, lends itself to jokes and puns in my native language; I suspect speakers of French and Spanish will also notice. The film’s greatest shortcoming is a weak screenplay. It seems as though it tried to offer social commentary by substituting aliens for people within that impoverished slum. Is this intended as a pointed critique of how we treat those we deem less worthy or different? If so, I may be among the few who grasp that intention. That's the only explanation I can see for the film’s opening: instead of transporting sick aliens to a lab and conducting years of in-depth study, they are simply placed into a squalid slum? It doesn’t seem logical to me.

Source on TMDB