This apartment is great!
The location is just above the U-Bahn, allowing quick access to the city, especially Alexanderplatz and Boxiplatz (two stations away on both directions, and full of things to do). The area is quiet, with a few restaurants and a grocery across the street.
The apartment is comfy, and clean with lots of sun. It runs across the width of the building so both sides have views of front and back. Opening windows brings a breeze in, keeping the place nice and cool. Lots of artistic decorations, adding a nice touch to the place.
Maria was very helpful with recommendations around Berlin, and responded very quickly.