We had a great time in Justina's apartment. It was ideally located for our needs and should be convenient to anyone staying in Vienna with quick (5 minutes) access to the closest metro station that is one station away from Wien Mitte (also 10 minutes on foot) that is a 20 minute train trip away from the Airport.
The apartment is comfortable and quiet and while there are no windows in the main room there is a nice deck that can be accessed from the bedroom. Would be happy to go again in the future !