The room is located on the first floor of a nice and quiet building, facing an inner courtyard, and it has a private bathroom. Everything you might need (bakery, supermarket, pharmacy) is very very close, as well as restaurants and pizzeria (as an Italian I would recommend "La Spiga"). The tram stop is in front of the building, while the subway station (Thaliastrasse) is a few minutes walk away. Maria-Theresien-Platz is 15-20 minutes by foot (I enjoyed the walk).
The host was super kind, our return flight departed at 9 pm and she let us leave our luggage at her place after the check-out, so we were able to enjoy our last day in Wien without carrying it with us the whole day.