My wife and I stayed at Monika's apartment and had a great week in Vienna. It is a single apartment with access to an interior courtyard. It is even nicer than the Airbnb photos indicate. It has a fully functioning kitchen with an array of pots, dishware, utensils; great shower; lots of towels in linen closet; and is stocked with all the necessities. The place is very clean and quiet.
Monika met us at the apartment on our arrival. She was very helpful by describing features of the apartment and nearby amenities. She has maps and brochures at the apartment for things to do in and around the city.
For people wishing to experience Vienna, we found this apartment location to be perfect. Many places are very walkable: the Stadt Park is right nearby; all of City Center (Innerstadt); the Danube Canal which you can walk along; and Prater Park with the big Ferris Wheel across the canal. We walked to all of these places.
There is a City Bike depot nearby if you want to rent a bike to tour around, instead of walking. We did not do this, but Vienna is a big biking city with many bike lanes.
The location to public transport is also good. The Wein Mitte major station is a short walk. It is the place for trains to/from the airport and is a hub for the Underground system. Even closer to the apartment are trolley (tram) lines. (I like trolleys because you can look at the city). For example one block away in Radetsky square (platz), we picked up a trolley and, with one transfer to another trolley (all transfers to one destination are considered one trip), we arrived at the Vienna Woods for a nice hike. The trip back was the reverse.
Another location consideration is everyday shopping. Within 5 minutes there is a Spar market, and only slightly further is a Billa market; both reasonably priced places.
To sum up, we were very pleased with the place. Monika was a great host, and we would definitely use this place again when traveling to Vienna.