We stayed in Bojan and Katarina's apartment during our stay in Vienna and had a very pleasant stay. The apartment was cosy, spacious and modern with a very stylish feel. Their is a major supermarket just around the corner and the local area is very nice and relatively quiet. Whilst it is slightly outside the city centre, it is very accessible via public transport given Vienna's highly advanced transit system so there were no problems getting to the city centre.
Bojan and Katarina were great hosts, always communicating and answering any questions we had.
Would highly recommend!