Rebecca was an excellent host and the apartment is incredibly charming. It's easy to find from Berlin Haptbanhof (the central station). It's located a few hundred feet off one of the major S Bahn and U Bahn stations so getting anywhere in the city is a breeze. The apartment was very clean, organized and very stylish. There are trains that run by it but they are not loud or intrusive in any way. Rebecca was welcoming and gracious. She had maps at the ready and pointed out lots of sights to see around the city, as well as practical things like where the nearest grocery or best coffee shop nearby was.