We were a family of four adults and a child and the stay in the apartment was perfect. The building itself was a little outdated, but the apartment was renovated and clean.
The kitchen is fully equipped and there are supplies for cleaning the dishes, soap, shower gel, hand- and bath towels and extra blankets. So besides that you have to make your own breakfast and bed, everything is taken care of :-)
It is really close to a metro and train station and in walking distance from Alexanderplatz. There is a supermarket nearby that has long opening hours.
Only negative thing (which the owner is not to be blamed for): the booked parking space was under some trees and after five days of parking, the whole car was covered in sticky pollen.