This place comes highly recommended. We stayed a family of five there (children 17, 15 and 12 years old) for a week. Communication with Gini and Eric just worked and we where received by a friend (the hosts live on the same floor in a separate appartement, but where away traveling). The neighbourhood is lively and bohemian, but in a safe and charming way. The flat is on the top floor (with elevator) and has lots of light. Everything was clean, everything was working. The station is a few blocks away and behind that streets with a vast variety of restaurants. 5 minutes to Alexanderplatz, 25 minutes to Schônefeldt airport.
We will definitely be coming back here.