We stayed at Katharina's house for two nights and had a very good time there. It is located conveniently close to many restaurants just around the corner and a short walk to the city's central squares. The apartment is located in a nice building and has all facilities one would need; clean bathroom, good bed and well equipes kitchen. It is not a bed and breakfast but we enjoyed the privacy of having our own place without the need to share space. There was some noice from the nearby bars late in the evening, but we could sleep anyway :)