The apartment is clean, well furnished but most of all incredibly convenient as a base to explore Vienna. There is a tram stop right outside the building entrance which is only one stop from the central train station and the U3 underground line can be reached on foot in under 10 mins. The hosts were helpful and welcoming and the key exchange was done in person. There was some noise from the neighboring apartments and the trams outside, something to keep in mind if you are a very light sleeper. Otherwise our stay was very enjoyable and we would certainly consider staying again.