At first I was surprised to see such a negative first review. After looking through the other comments I understood why. There is no middle impression on this movie. It's one of those movies that you love or hate/dislike. It's not a "good" or "not bad" movie.
I just think it touched some people, like me. I spent 1 1/2 years in Paris and I have a profound passion for French culture since I was a kid. For me, after living for more than 5 months in China, it felt good to remember Paris. I saw a movie that depicted only a snapshot of some people's lives. Their way of living, their problems are typical to the French society.
One user was talking about plot, drama. For me, this movie was more about feelings than actions. Some smiles, some tears, the image, the people. It made me remember "Paris, je t'aime".
I think that if I didn't have the Paris experience or an affinity for the French society, the movie wouldn't have touched so much. I think there's a second level in this movie that is accessible only to those who understand the French society.