Dagmar was an excellent host, very helpful and friendly and easy to communicate with.
The flat itself is a small one-room apartment with a separate bathroom situated in a larger flat where Dagmar lives. But since the entrance to is right next to the main door, it feels very private.
The apartment is on the third floor of a very grand, beautiful town house from the turn of last century. It was clean and bright and has everything you need, really, including tea and coffee (and some delicious cookies!). It is ideal for one person or a couple. Since the windows open into the courtyard, it is quiet.
A big plus are the many good restaurants/cafes in the area (just outside the entrance, in fact!). The flat is only 100 meters away from the next S-Bahn station and there is a direct bus to the airport Tegel close by (takes about 20 minutes).
I can highly recommend the place and would stay there again!