Clean and cozy apartment. Even a little bit spacier than we expected. Fairy priced. Neighborhood is safe, as Vienna in general. 15 minutes walk to Schonbrunn palace and zoo, 10 minutes to subway station Hietzing (line U4). Another option is using 52 tram (stop just next to the building) to the final stop of Westbahnhof and then subway line U3 to the major central points of interest (about 30-40 min in total). If you are travelling with a kid, transparent shower door might be a surpise:)
Sonya is a very responsive and supportive host. Great experience.