I can definitely recommend a stay with Nelly and her boyfriend! They are great hosts, the apartment looks exactly like in the pictures, and everything was perfectly clean. The room is in a private area with your own toilet, so it is almost almost like a separate apartment and privacy or noise is not an issue at all.
Nelly and her boyfriend are great hosts and try everything to make your stay as enjoyable as possible (great communication before the stay, recommendations about what to do in Vienna, and Nelly even made us coffee and lent me a jacket when it was raining)!
The location is amazing as well - a nice traditional and quiet area, you can walk everywhere and the subway is only 1 minute from the Appartment. So all in all we really enjoyed our stay :)