We had a very good stay at Christian’s . Apartment, located in a safe area, was very clean and full equipped (even a washer/drier, which is convenient partcularly if you have kids). It's about 200 metres from subway station (Kardinal Nagl Platz, U3 line) It's 4 stops from Stephanplatz.
2 supermarkets nearby. Communication was excellent and Christian and his girlfriend were very responsive.
I recommend this accommodation