I stayed in a room at Oliver's place in my first week in Berlin. The communication with Oliver prior to arrival was really easy. The U-Bahn stop is close by, and the apartment is in the middle of an otherwise busy neighborhood, yet it is in a quiet street. The apartment is clean and Oliver is very approachable. I enjoyed my stay there and would recommend it to anyone who wants to have a nice stay at a good location for a fair price without hesitation.