For a stay in Vienna, I really recommend the apartments offered by Eva, Michi & Friends ! Unlike many Airbnb hosts, they welcome you on arrival to fully explain how the apartment works and what is around it. Lots of little attentions await you and some more surprising than others, haha. They always knew how to be there for us, always responsive to messages and questions, and they always tried to make our stay as pleasant as possible. They also provide a "manual" with all the possible and recommended things to do during your stay (entertainment, restaurants, outings, etc.). Thanks to them !