This was one of the movies we saw at Sundance 2009. We found it to be an interesting portrayal of the relationship between a live-in maid and "her" family. The family portrayed was from Chile, and reflected the writer/director's actual family.
The maid shown in this film truly runs the household and has a strange power over the family. She knows what happens to everyone and how to sabotage them if need be. She has a love/hate relationship with most members of the family, some of it closer to hate more often than not. She also will not allow another maid to share "her" household, until she meets a certain someone. Since this is a realistic portrayal of Chilean family life, we found it fascinating to watch. Good job to all of the actors!