Just seen this on All Hallows' Eve. It's a bit old, but gold! I definitely have to rewatch this, because you just got to pay attention to 'know' what is happening and follow the story. I think you'd better understand/follow the story and that it will make more sense when you watch it a second time.
The whole movie experience was pretty much like every time you think you got it all figured out, you learn something new and turn out to be all wrong. I loved all those twists and turns and the is-it-real-or-not feeling like, is it really REALLY happening? Is it really acting for her job as a actress, or is it all just a trick of the mind...