A very good apartment, like in the photos, in a great place, a few minutes walking to Alexanderplatz.
Even if it is a building built in 1971 (and refurbished and very well maintained in the common areas) the apartment is very big and is perfect for a family. Nice view. Very quiet with nice neighbors. All the stuff presented on the page was there and functional.
My greatest fear was that in accordance with German rules for heating/energy (19 degrees) it would be not warm. But the hot water was very hot and had great pressure (15th floor!!) and the heaters were really hot if you needed them. So zero heat issues.
The communication with the host was very good.