We enjoyed the two days that we stayed in Rainer's apartment. The place has all the amenities that made our stay convenient, clean and comfortable. The apartment had good and modern architecture and looks better in real life than the pictures. It is accessible by tram and S-Bahn and you can find yourself in Berlin city center in less than an hour. A grocery is conveniently located within walking distance. The place is peaceful and away from the chaos of the city in a quiet neighborhood. Rainer himself was very kind and hospitable. Communications with him were timely and efficient. My only regret was I didn't stay longer in his apartment. But this will be my new home whenever I'm in Berlin. Highly recommended.