I wish I could rate Nora&Andrej's flat more than 5 stars, as staying there made my impression from Vienna even more positive .
Andrej provided detailed instructions how to get to the house several days prior to our arrival, and we easily found the place. We were welcomed by Nora's father, who gave us the keys and some advice on sightseeing. The flat itself is a lovely studio in an old Viennese house, and has everything that's needed for a comfortable stay. The neighborhood is quiet despite the proximity to the central railway station, only 5-min walk to awesome Belvedere. Though the U-Bahn statio is very close, we never used it, as it takes only 15 minutes on foot to reach the city centre (a lovely walk via Karlsplatz with the amazing Karl's Church). There are 2 supermarkets near the house, and a wonderful bakery on the corner.
I'll definitely recommend Nora&Andrej's studio to my friends going to Vienna.