We very much enjoyed the stay in the apartment. It is spacious, clean, well equiped - and in an absolutely amazing location. You really are in the center of Prenzlauer Berg, but still in a quiet street. There were 5 of us, and we had more than enough room.
Just across the street is Kulturbrauerei, whith a supermarket and a bike rental (they also offer nice tours, apparently).
Birgit is an excellent host, offering lots of advice on what to do in Berlin, helping with luggage storage, taxi to the airport, bike rental, etc. etc.
Thank you Birgit for the great stay!