The apartment was really clean and spacious enough to feel comfortable and not claustrophobic. It has everything that you might need - from washing machine to ironing board and iron, and fully equipped kitchen if you want to make yourself a meal. Josef is a great host - responding quickly and finding solutions if necessary. 8 minutes walk to Längenfeldgasse or Gumpendorfer Straße U6 underground stations and 3km from Schönbrunn (30 mins walking or accessible by U6 -> U4 metro).
Strongly recommended if you need a place to stay in Vienna.