I would really recommend the Ronen's apartment to stay in Vienna! It is very clean and nice, close to the metro station and in a walk distance to the Schönbrunn garden. There is also a supermarkt in the house next to the apartment. We found in the apartment everything, we needed - tea, coffee machine and capsules, dishwasher, shampoos, dishes and so on.
Ronen is very friendly and responsive host. He also allowed us to check in several hours earlier than it was scheduled.