I chose a room in the AirBnB application, paid it and got confirmation that the room is reserved. But after my arrival Stefan told me that the room I chose is not available, because someone was faster then me. I really do not know how is it possible, if it was AirBnB's fault or his. It is suspicious that the cheaper room was not in the options of the facility. Anyway, Stefan offered me another cheaper and smaller room and returned me 10 EUR / day. Luckily we did not need the kitchen and washing machine eventually.