Boy, now this is a polarizing film. I wouldn't blame or argue with someone if they were to dismiss this film as boring, pretentious, intellectual bullshit. In many ways, that is true. I realize this is not a film for everyone, but I think everyone should still see it anyway. It is good to exercise the brain and participate in or experience philosophical discussions, which is pretty much what this whole film is: a 100 minute plot free series of (not necessarily connected) discussions about various aspects of life, philosophy, and film.
I like the animation technique of rotoscoping or filming things live action then drawing over it with wild colors. Linklater later used this same technique for A Scanner Darkly. The result of doing things this way is very surreal, trippy, and dream like, the appropriateness of which I don't think will go over too many peoples' heads.
I dug this film quite a lot, and found much to like, but I will be honest and say that I didn't quite grasp everything. Some of it went over my head, and I did get a little restless watching this, but overall, I respect it, especially since it reminded me of the fact that I (though not recently) love sitting down and having conversations like the ones presented here.
This is a very unique film with wonderful moments, a lot to chew on, a gorgeous look, and some excellent tunes. Do give this one a chance. Even if you end up hating it, you'll be doing yourself a favor, even if you don't realize it.