Bernd is a great host. He was easy to communicate with and extremely helpful. His penthouse flat was ideal for our stay. There is a wonderful outdoor balcony to sit on with views of the local streets. There are plenty of restaurants, bars and coffee shops within walking distance. The location is easily accessible to various areas in the city via the U Bahn, S Bahn or Uber/taxi. The neighborhood is safe, as is most of Berlin (don't let the graffiti fool you) and very quiet at night. I was in town for the marathon and it was a 25 min trip door to door via the U Bahn from the apartment to Brandenburg Gate. We would absolutely stay at Bernd's flat again.