I recommend Salma's apartment to everyone. The place was really beautiful and equipped with all the living tools.
The transport was very good and there were many cool shops like kiosk, super market, bar and cafe around the apartment. The apartment is upstairs and there are many stairs, but if you stay for a while in a nice apartment, it is no problem at all. Although my German is not good, her friendly and quick feedback was also a great help. I would like to stay again when I come back to Berlin! :-)