Eva and the girl who welcome us were very nice. We had a great communication. I apreciate that the answers to my questions came immediately, which helped a lot. I received additional details about places to see and locals to eat/drink.
The apartment has an extremely good position whitin the city-center, 8-9 minutes to Wiener Staatsoper (walking). It's a generous flat, in terms of surface, clean and well equipped. A super stay!