Comfortable stay in a great area (Kreuzberg). Before the trip, Stefan gave great directions to check in. We only had limited communication with Stefan during the stay (as he was on holiday), but everything in the apartment was laid out sensibly and there were no problems, so this did not present any issues. U-Bahn stations are about 10 minutes walk away. There are bus stops that are closer, which could be more convenient depending on where you are going.