Small third-floor (no lift) studio-flat with bedroom, bathroom, kitchen and separate toilet. Basic amenities but all clean and fresh. Top feature for me was that it was absolutely quiet - no street noise, and no noise from anywhere else in the building. And very convenient for transport; you can walk in 15 minutes to Hauptbahnhof (main station), from where it is 15 minutes by train to the airport. Also close to U-bahn (5 minutes walk). For a short stay in Vienna while attending a conference, it was exactly what I needed. Young-Sil was kind enough to meet me at the flat at 11 pm on my arrival - thank you!