We went to Vienna for our first time as travelers from the United States. Upon reading the description of the area in which Osnat's apartment is (Leopoldstadt), we decided it was good and booked it.
The area of the city where the apartment is located (Leopoldstadt) is not very good for tourism. Actually, a tour we took described it as "a once thriving Jewish center". There was little to nothing going on there and was not a good place for a traveller staying a few days.
We were in an area far from the city center and any of the monuments or museums (~25-30 min walk) and were woken up every morning to loud construction directly outside the window at 7:00 am every morning.
We also reached out twice to Osnat before we came about restaurant/museum recommendations. The first time yielded no response and on the second try, she gave us a very curt and unhelpful response.
Overall, I would not stay here again and would not recommend a first time traveler to stay here in Vienna. Look for somewhere closer to the city center. It will cost more $$ but will be well worth it.