The apartment was located in an area which was a little bit doggy at night. However, we never felt in any case frightened. The apartment also was located in a very old building, which can be decieving. Despite the oldness of the building, the apartment itself was rather new. Also, a supermarket and a pharmacy are located just around the corner, which is vert convenient. We visited Vienna on days when it was very very cold. The heating in the apaetment worked perfectly and we never felt cold inside it.