Unsure how I felt about this

After watching this film twice I'm finding it really hard to rate and comprehend, its certinally a far less mainstream film then I originally anticipated and was caught completely by surprise by all the 9/11 references and singluar day narrative. While I found it sparked much discussion, I found it to be lacking as entertainment. I just want to hear some opinions on the film and what you liked/didn't like about it and, since I'm Australian, whether being American or having been born years before the 9/11 makes the film more significant. Personally I have given this a 5 because of Completely mixed feelings about the film and its messages, if there are some.scenes you suggest re-watching that you found significant, provide a link and I'll take a look, definitely a thought provoking film, just not an entertaining one all the way through