We had a great stay in this apartment. It was very clean and the heater worked very well, which was lucky, as it was very cold in Vienna when we were there. The apartment is slightly off the beaten path, in a quiet neighbourhood, but we could still walk everywhere we wanted to go. It is also silent at night, with only a slight noise from the heater to be heard. Communication and coordination around our trip went off without a hitch. I recommend this place.