I stayed in the apartment for the period of 3 months, and it was totally great. Small, cosy studio flat, located just a few meters from the metro station, bus and trams stops, in a vibrant area full of facilities such as foodstores, bars, banks etc.
Either the apartment or the whole building are fully renovated and accessible. The flat itself is well equipped and full of daylight. My contact with Marianne was quick and easy. She is a very friendly host.
If you search for a nice place to stay in Vienna, well connected with most of the city both during the day or night, accessible on feet from the fancy 6th and 7th district full of great bars and shops, this is a place I can fully recommend. Five stars from me!