Katharina is a lovely host, and her apartment couldn't be a better launching off point to discover Berlin. There's plenty of great eats (currywurst, vegan burgers, Vietnamese, etc. etc.) nearby, and the U2 train at Eberswalder Str. gets you close to all of the main sights or a quick transfer at Alexanderplatz a few stops away. I couldn't have asked for a better place to stay!