A separate room in a flat with its own toilet and shower, and its own entrance. Almost like a separate apartment. Andreas is a very helpful and friendly host, always available to answer any questions. The room is very clean and equipped with a kettle, microwave and fridge. The apartment is within 10 minutes walk from the nearest S-Bahn station. The centre of Berlin is reachable within 20 minutes by S-Bahn. I definitely recommend this apartment.