We stayed at Lucie and Markus's apartment for 3 days in March 2015. Lucie was a great host, very responsive and friendly. She was also super accommodating considering that we were arriving late in the evening - she had a parking spot for us and short term parking tickets that we could use the next morning until we had a chance to move to a more permanent spot (by the way, we parked at the Garage Reichsbrücke, Wagramerstraße 2 just on the other side of the Donau from the apartment - it was 5 EUR per 24 hours and there was an underground station right outside - http://www.parkeninwien.at/garage-61-337.html).
Lucie gave us a quick run down of the apartment and some key points to see in the city as well as some maps which we used a lot. The apartment was well appointed and had all the basic necessities that we needed (towels, dishes, salt + sugar) plus extra comforts (washing machine, dishwasher, extra towels, good espresso, toilet paper, etc). It is as shown in the photos. The beds were comfortable and there was good water pressure. The building was mostly quiet, with the exception of a few noisy neighbors for 5 minutes here or there, but nothing unexpected in a city apartment.
The location was convenient for going into the city center - a tram just outside and the underground just a few minutes walking.
All in all we were very happy with the apartment and the interaction with Lucie and would recommend!