Our stay with Rita was very nice. She was very helpful giving us directions to get to her home and how to get around the city. The location is perfect, right by a central u-Bahn that can take you all over the city, and the apartment is walking distance to Potsdamer Platz and Brandenburg Tor if it's a nice day. You will have to share the bathroom with the host and another tenant of the apartment so the bathroom was sometimes in high demand, but overall it was a very nice stay.