Seems to me the most frequent complaint about this film is that it is 'slow and boring' and the most positive that it is like Mulholland Drive. The latter comparison, is falsely made, I guess, because the film is complicated and the former remark simply because this tends to be the fallback option if there are not enough explosions. If anything the film moves too fast for its own good. The dialogue is excellent, full of provocative thoughts and human insights but a lot is expected of the viewer and it is easy to get left behind. The therapy sessions should be an opportunity for things to slow down and for us to get our bearings and sort out what is real or not to us and perhaps more pertinently what is real or not to the characters. But nothing is as simple as it appears here and even the sessions seem to take us into even darker areas. Excellent, but not the easiest film to follow because it does not set out a simple path. For those for whom that sounds 'boring', I guess will find it boring. Not sure what that proves though.