Matthias is absolutely wonderful - he met us at the property, helped us with our luggage after a super-long flight, and even had delicious bread and butter for us waiting at the apartment. We arrived on a Sunday, everything was closed and so he literally saved the kids from starving. Matthias is very quick to respond to messages, he allowed us to check in early and gave us all the directions we needed for a great stay. The apartment is centrally located, about a 12 min walk from the CAT station and the BILLA, and a 20 min walk (with young kids) from the Prater. There is a great pizzeria a block away and the Hundertwasser museum is 2 blocks away. Tons to do and to see. The place is large, it has everything you need (including a nespresso machine!), and very quiet considering the location. We would love to come back to Matthias's apartment.