I think this is quite a nice movie. In a scene that is somewhere halfway (actually I bet it's precisely halfway) you get the clue you need: there's no beginning and no end in this movie, so don't bother yourself looking for it. Once this is taken for granted, you see some quite excellent scenes, in which you are in the thick of things of the life of some (more of less) loose connected people. There is humour, affection, love, lust and sadness, and most of the players are very convincing. The only character that could be missed in my opinion was Linda, played by Franka Potente: she is playing exactly the same character as she was in 'Lola rennt' (without the running). Just an irritatingly weird girl, with no real or convincing acts and emotions, except her singing her own flamenco song. If Franka Potente can't play a character unlike Lola, I'm sorry to say I've seen enough of her by now.
