I agree with Ewa from Lukow that the Jolanta Fraszynska playing Kasia is doing a good job. Artur Zmijewski playing Jurek = Mikolaj = Aleksander = Piotr is somewhat wooden, but he has to be. Under each of the different names he uses, Piotr is not really engaged emotionally. However, the previous two commentators somehow did not note an unusual aspect of this film. In a typical romantic comedy at the end the heroes fall into arms of each other and it is clear they will "live happily ever after". Laweczka is much more realistic, a very rare if not unique feature ! Piotr takes keys from Kasia's apartment declaring "I have not undertaken any obligation". He will probably get his things from the apartment of his estranged wife and move in with Kasia, but the future is uncertain. He might move on after a conquest of still another woman. On the other hand, it is at least possible - after deception from a woman he loved and his two broken marriages - that he might settle with Kasia. Kasia apparently is willing to risk his abandoning her as well - precisely because there is a chance he might stay and she really loves him. Future will tell - as in real life rather than in a typical film.
