Thank you, Joanna for the help. She wrote detail how to get from the airport to the flat. Since subway is undergoing repair work.
We were late, but Joanna's friend waited for us and showed us everything in the apartaments. Flat is near the Schönbrunn Palace and from the center of the 15 minutes ride. The apartment is light, clean with a beautiful interior. There are all necessary bed linen, towels, a washing machine , microwave oven. I recommend.