Our experience in Vienna was great, like our stay at Regina's apartment, located in a quiet and safe area.
Of course not everything was perfect, but was very good. We consider that the sofa was very hard and early morning light was bright inside the apartment, maybe those are the only negative aspects about the flat.
Regina gave us a lot of information about Viena and we found prospectus at the apartment.

Everything was very clean, quiet neighbors, restaurants and interesting places near apartment...we really had a good time