Alex and Ramona have a lovely, large flat near public transit in Vienna. Although we did not meet Alex, Ramona was very kind, and she even printed out a metro map for us and wrote restaurant recommendations on it!
The room we stayed in was huge with a lofted bed, although Ramona said it would be no problem to bring the mattress down to the floor if the height is an issue for any guests. The bathroom is shared but we had no issues, and they gave us access to their common spaces such as the kitchen and living room. The wifi was great. The vibe of the apartment is quite cool and modern.
Although the flat is not in the touristy part of downtown, we really liked the location because there were still many shops and restaurants nearby, just geared more toward locals. There is also a gigantic, beautiful public park near the flat as well as a metro station just down the street.
100% recommended!