Interesting, but not quite succeeded.
This was a beautiful film obviously, and I think it's very brave to make a film about one of the hardest subjects I could personally think of. It was also plain to see that Kieslowski an Piesiewicz put more than a couple of hours of thought in it.
But this was not only one of the hardest subjects, it's also a question that will most likely never be answered. Could anyone be sure that there is someone almost identical to you? And more importantly, that that persons actions somehow influence your actions? Not directly, not in the action-reaction way, but purely instinctive? So that in a sense, someone else (or is it an extension of yourself?) is living your life, determining or at least influencing your choices?
These are questions that are impossible to answer, and although these writers came a long way, they too failed on shedding enough light on the subject to make it understandable. I'm not sure why, but throughout the movie I more and more began to feel that there was going to come some kind of closure to the story, some kind of explanation of what I had seen. It didn't come.
I loved how certain events were situated after each other, for example when Weronika and Veronique meet. Well, they don't really meet but you get it. Weronika is obviously stunned and she almost seems enlightened because her feeling that she's not alone gets feet on the ground now. After this, she performs for the orchestra leader and she gets selected because she does an amazing job. During her performance she is obviously in an extremely good mood, almost in ecstasy because she had seen Veronique. Such things strengthen the feeling that they are connected, that their actions affect each other.
But I was longing for more of these scenes, where ones actions had a direct effect on the other. On the other hand I loved the subtleties, but somehow I had the feeling that the large amount of symbolism in the film kept the relationship between Weronika and Veronique on a too artificial level.
I hope someone can in one way or the other relate to what I'm saying, because I'm more or less describing a feeling, which I find pretty hard. So that could be the reason why you might find the above a bit fague.