First of all, i would almost call it a must read before this movie to at least have read the Iliad by Homer. ( watching the movie Troy, does not count. )
I am usually adverse to movies with a slow tempo, but thanks to great acting, amazingly written dialogue and a cinematography that captures ordinary life, without it getting gritty or depressing.
There is so many themes packed in this movie, with seemingly minimal effort that it is hard to count them all.
About the ending. My first instinct is to wanting to have a few more clues
on what was going on, as it is hard to figure out what events are just a artistic metaphor and what are real clues on what is going on.
But after a little thought it was actually perfect, we get the same information as the rest of the city, that follows the local news.
So in conclusion, not a film for everyone - but if you want to follow some ordinary peoples life during an catastrophic event, this is for you.