Actually we've stayed for two nights in his house. On the first day when we arrived near his house, we had some problems to find the house. So I called him about more than three times. However, every time he answered friendly to our asking and he recommended us one famous restaurant called Salzamt, which located within 2-3min. from his house. The tastes were really good. Also whenever I texted to him, he sent me a message right away. And the house is really very central so if you want sightseeing some famous places like St. Stephen's Cathedral and Austria National Libraries, etc., you can take U bahn from Schwedenplatz to Stephanplatz. Or even for other places, you can go everywhere you want using U bahn which is located very close to Rainer's house. It was so nice stay.