Klaus is friendly and will gladly help you with all your Berlin questions! The room is comfortable for a few nights, very clean bathroom, and convient location (close to public transport, but also very walkable to Schöneberg, Kreuzberg, BergmannKriez, etc.). Delicious döner across the street! The weather was quite hot in Berlin while I was there (25-30 degrees) so it got pretty hot in the apartment and in the room. It is hard to leave the windows open at night because of the noise of the trains/roads so this is something to consider if you dislike too much heat and are sensitive to noise.