Katja's apartment is beautiful, with high ceilings, great design, lots of light and fresh air, and very cute cats. The neighborhood around the apartment was ideal -- it felt safe because there were always people out and about, it was conveniently located near lots of restaurants, bars, and the tram, and it was quiet at night. Katja was an amazing host, very knowledgeable about the area and about Berlin. I wouldn't hesitate to stay here again or recommend Katja's place to friends.