Good location, close to Alexander platz, shopping, train. We were coming from Schonefeld airport and it was very easy to get to the apartment. We were coming very late and Frank dropped off the key for us without any problems. We could also stay longer on the departure day which really helped us in planning our travel. It was very quiet at night, so we could sleep well. No noise from the street or the neighbours. Hot water with good pressure in the bathroom :-)
we visited in the winter, and the apartment was well heated. It also has an elevator.
I would recommend :-)