Excellent host Daniela !!
Before the trip, I received all tips as grocery store (food, juices, bread), trains information, etc.
The apartment is located ONE block from the main train station in Vienna. The same train station where the express from the airport arrives.
At my arrival, they were waiting for me at the apartment. Nice Surprise that it has an espresso machine and some snacks. It even had a US electrical adaptor !!
The apartment is excellent located in the center of Vienna. I made this trip for a conference, but if you are visiting the city as tourism is very well located as well, either if you like Tram, Train or Hop On & Off is two minutes away.
The building has a very good lift (elevator).