I might be one of the few people who really likes this movie despite its flaws. Sure its pretentious and a bit all over the place but to me there is some strange poetic beauty in this film I cannot shake. And to be honest I'd rather take a messy movie with an interesting tone or feel than a well-put-together-middle-of-the-road-movie which already confirms everything I know about cinema.
Weakened by an inconsistent and utterly bizarre plot, "It's all about love" suffers of its multiple attempts to present a diseased and dying world through a disjointed story and improbable metaphors. Yet, it's not completely devoid of a certain and inexplicable charm, which unfortunately is just not enough to save the whole thing. Quite an unidentified object of cinema.
Something in this is not very convincing. And if I think about each and every aspect of the film separately, I fail to identify what it is. But if I was forced to answer, I would say the story. I do mean the story. The writting (of the story) is well done. And even its metaphorical potential is quite amazing. But there is something quite unconvincing in all of it, everytime I did look at it. And I am a fan of sci-fi.