We really enjoyed our stay here, the location is perfect if you want to stay near many of the sights and the subway station is only a five minute walk. There are also many restaurants and a good supermarket within the area.
The apartment was very clean and the beds were comfortable. It was very hot when we were in Berlin and it was a quite noisy when we had the windows open, but the apartment office provided us with some fans which was very helpful. The office also stored our luggage on the last day after we had checked out. Katarina sent us a lot of information before we arrived so we knew exactly where to go and communication was excellent. Highly recommend, perfect location!