We loved our stay at the Sisi Suite II in Vienna. It was very close to Schönbrunn and only 20 minutes with the U4 to the Innenstadt. We were a family of 6 and the space was great for us. Martin was very responsive and always available if needed. A pharmacy for COVID tests to return to USA is only 8 minute walk down the street. Parking on the street is pretty tricky but we turned in the rental car after 1 day and had no problems getting wherever we wanted to go with public transit. The apartment is on the street level so it was easy to get our luggage in and out. We loved this area of town (Hietzing) and it was fun to be in Vienna for the Holidays.