I was four months in this apartment as I moved to Berlin for work. The apartment is very comfortable, spacious and well furnished. The location is excellent. It is a few steps from the stop for U7 and U9 lines. The area is full of services of all kinds.
Hilda, the owner, is kind and helpful. Her only flaw is that she speaks only German or Spanish, so the check-in can be a little bit difficult. However, the son, who write on Airbnb app, speaks very good English.
Enjoy!