The host: Polite, pleasant, and respond quickly. Most of all she was very accommodating to us and let us check in early and check out late.
The location: Not far from the apartment is a tram that will take you to a subway station in 2 stops. From there is your gateway to the rest of the Vienna. The network of U Bahn and S Bahn will take you everywhere you want to go. A supermarket is also nearby.
The apartment: Clean and well furnished. Everything we need is there. The kitchen is stocked with coffee, tea, spices and other tools that it feels like a real home. The balcony treated us with magnificent sunset every evening (we were there in August).
Overall: I highly recommend Andrea's place if you visit Vienna.