The host was well-organized and communication was correct. We had a pleasant stay. Bed, kitchen and bathroom are well equipped. Vorgartenstraße U1 Subway station just below the building made it amazingly practical for us to visit the city!
The only problem we encountered was excessive heat for a couple of days: leaving windows open to cool down the flat exposed us to traffic noise. I guess this problem is not existing most of the year and the fan suffices.