I stayed in Mariola's apartment for just over a week while on a research trip. The apartment is well located, very close to U- & S-Bahn as well as bus links. It takes around 5 minutes to get to the city centre by U-Bahn (U3). The apartment itself was very warm and clean, with a great shower(!) and most everything you would need for a short trip. Mariola is a very good host, very quick to respond and her instructions were straightforward and easy to follow. I would definitely recommend this apartment to others.