Matthias is very kind and helpful host. The apartment was easy to find, really close to Vienna Old town (maximum 20minutes using the bus (48A, U6 and other trams). The region was safe and in close distance we could find restaurants and supermarkets.
As for the apartment was the same as in the photos, was really clean, the heating system was perfect, the bed was comfortable and everything in the house (coffee machine, washing machine and everything in the kitchen) are brand new.
We fully recommend the apartment.