Unfortunately not the best experience. Firstly, response times were a bit slow. Secondly, after asking for directions from the station was given directions from the airport. Thirdly, even though I gave a specific time as to when we would arrive I could not reach our host. Eventually got access 1.5 hours after arriving.
The flat itself was all in order although somewhat out of the main area of attraction. Things improved once we were able to obtain information on how the public transport operates - would have been helpful to get advice and suggestions from our hosts.
Vienna is great but rather stay closer to the Old Town for a better tourist experience.