The apartment is in the best possible position right in the center on the city. walking distance to lots of important tourist attractions like check point Charlie and the section of the Berlin Wall and lots of museums. Aggi was really helpful at check in with lots of maps and books on Berlin.
We rented just a room. Which was very large, but the person who lived in the other room had just moved out so we had the whole place to our self. There is a metro stop about 100 meters from the apartment.
Very easy to get to and from the airport and the main national and international train stations.
Would really recommend to stay here