first 20 minutes I just thought it was too confusing and didn't really want to watch the rest but I stuck with it and it ended up being really good. Like, everything you thought was simple and true got even more complicated. At the end you just don't know what actually happened - but in a good way.
If you don't like open endings, don't watch it. LAWL.
yay for Christopher Nolan.
Memento, Batman Begins, Dark Night.
Completely stoked for Inception.