My husband and I stayed for three nights and really enjoyed the apartment. It is very close to the train station and grocery shopping is just down the street. We walked or took the metro everywhere we wanted to go, such a convenient location. It is also very quiet and looks out over the backyards of three separate buildings, no streets, just grass and trees. Mem is a good host, very prompt in communicating and provides a lot of extras (kitchen is well stocked with dishes, utensils, pots making it easy to fix our own meals). The place is very clean, bright, airy and the bed comfortable.
I highly recommend Mem’s place for your stay in Vienna.