Very nice apartment in a quiet and well connected neighborhood. It takes about 25-30 minutes to reach Alexanderplatz.
Maja is a great host, very pleasant and communicative. She responded quickly to all questions, provided local tips and even let us leave the bags in the apartment well after check out time, so we didn't have to drag them around the city while we waited for our flight.
I highly recommend this place, would be my first pick on the next visit :)