The host went on holiday and left the keys at somewhere for us with detailed instructions. There was a no trouble locating the keys and they gave us a warm welcome remotely by preparing some little Christmas gifts.
The place is impeccably clean with good amenities, including oven and washing machine. And the location is walkable (approx 6-7mins from the station Rehberge on U6), Bus 120 could directly reach the place from Berlin hbf.
Overall I would recommend this place to people who intend to have a wonderful stay in Berlin!