We had a fantastic time in Vienna and in Yannick's apartment.
The room is exactly as in the pictures and so bright and warm in the morning when sun rises. We didn't meet Yannick but he kept in touch and made us feel very welcomed in his apartment, even without being there. We were on the budget so decided to walk to city centre everyday, it only took us 35/40mins of walking to get there and the beautiful weather made the walk even nicer. Definitely would recommend Yannick's place.