We (a family of 4, our children are young adults) stayed for 5 nights in Ingela's City apartment and we were very satified: the apartment was spacious, clean and fresh and Ingela was very friendly in receiving us and gave us useful information (thx esp. for cheap parking advice!).
Especially the location is perfect, since the apartment is directly located near the Ring and only a few steps to MuseumQuarter and U bahn.
We will certainly recommend this apartment to friends who are planning a Vienna trip!