This space is fantastic. Very clean, bright, and with elbow-room to spare. Everything is new and modern and feels well tended, but the apartment also has charming old-world touches like chevrons floors and high ceilings. Just wow.
The location is perfect--just on the edge of the tourist zone, near the opera, but also on the edge of non-tourist sections. so guests have a choice. Loads of restaurants, a grocery store feet away, and despite central location I slept well.
The apartment was also well heated in a dismal cold winter, so I was cozy, and the wifi was excellent. Eva was punctual and friendly and I had no reason to contact the hosts while I was there for a week, since they had thought ahead and provided pretty much all I needed. If I come back to Vienna, I hope their flat is available again. One of the best spaces I Airbnb'd in, by far.