The host was very responsive to messages whenever we had any questions. Upon arrival, he gave us a tour around the flat and told us we could also use the kitchen, the fridge and dishes and cutlery if we needed. Both Mario and his wife were very kind and even let us leave our things in the apartment for longer. The place was sparkling clean and we were pleased to spend our days in Vienna at it.
Another advantage is that it is very close to a subway station, which makes exploring Vienna very convenient.