We stayed here for five days with two kids aged 12 and 15 very comfortably. Can easily accomodate more. The apartment has many thoughtful touches, is clean, new and with everything you would need in your stay.
The location is unbeatable. Opera is almost across the street. Music Verein (Wiener Philharmoniker) is on the same block. Konzerthaus, Stephan’s Dome and Nashmarkt are within 5 to 10 min walk. We have not even used the subway with its entrance within 100 ft.
Wish to stay here again if available. Strongly recommend it. It’s worth it.