We stayed at Peter's place for 5 days in mid June and really enjoyed our stay here.
The apartment was very comfortable for our family of 4 (including two kids) and had all the amenities we could ask for. As previous reviews have said, the place felt remarkably clean - and we were comfortable with our little one crawling around the place.
The main room was a very large size - it has a very comfortable large sofa-bed which was already set up as a sleeper for our convenience. Peter also provided us with a baby crib (on request). There is a large built in wardrobe/closet for all your stuff. And a work desk if you need it. The radio phonogram was a nice touch !
The second room was also a decent size - holding a double bed and a large standing dresser.
The kitchen/dining area was a comfortable size and was well equipped with everything that you would need - dishes, silverware, pots/pans etc. There is a new dishwasher installed. The bathroom has a tub and a washing machine (with detailed instructions on how to use it). There were lots of extras supplies (detergent, bath soap, towels, beddings etc) provided in the closet if you were to need them.
Peter had arranged for a caretaker (who lives in the building) to meet us at the place and walk us through everything. He was always timely in responding to any questions we had both before and during our stay - via text or the AirBNB app.
The location of the apartment was great - very central and about a 5-7 min walk to the Stephansplatz and the Inner Stadt area. There were several good cafes/bakeries nearby The nearest U station was a 3 min walk from the place. There's a Billa nearby for groceries.
TIP: Since there is the Hyatt hotel nearby finding a taxi on the street was easy for getting to the the train station.
All in all, a great stay. We'd highly recommend this place to explore Vienna.