The place is amazing! It's on the 34th floor and makes you feel high in the sky. You can see the Danube from the balcony. It's also very cozy and neat with all the nice trifles and flowers placed here and there. You can easily get to the city center by underground. There is a supermarket nearby with all the necessary groceries and stuff.
Ewald is a very attentive, courteous, and kind host. He and his beautiful wife met us at the bus stop and took directly to the apartment, showed the place, and left the sightseeing insights which were very helpful.
Next time we are in Vienna, we will first knock at Ewald's door:)