The apartment is beautiful, clean, and comfortable. We had five people here and it was cozy but not too small. Peter very kindly met us even though we arrived late at night, and helped to show us around the apartment and indicate useful landmarks on the map. It’s about a 20 minute subway ride from the center, or 5 stops, but the metro station is really right around the corner and super convenient to walk to. We had a great stay in Vienna, I recommend Kathi and Peter’s place!