We stayed with our kids over a weekend at Rainer's apartment. Rainer is was great and very accommodating host. The apartment is conveniently located in a quiet side street and next to the lively area Wien Mitte. The city center, shops, and restaurant as well as the Wiener Prater, a huge public park space, are very close. We had a very comfortable stay. Absolutely recommended, especially for people who like stay at a typical Viennese place.