Very nice place for two, around 5 minutes to underground station and then 10 min to city centre. Yvonne organised our stay really well and was available any time for some questions we had. Also provided us with a guide with everything you need to see in Wien as well as restaraunts, bar etc. Only issue we had was some noise from the street, but that was temporary as they were having some construction work in the road and it was not the host's fault.