We loved our stay at Lena's flat. The location is perfect, we walked during the whole 4 days (only took the U-Bahn to go to Schönbrunn and to Grinzing!). Lots of nice cafes, bars and restaurants around the flat. The building is beautiful and the flat itself is quite big and nice. Please note that the bedroom gives on the street so it can get quite noisy to be able to sleep (and as the building is old, the sound isolatiom is not the best one).