We stayed in the Appartemet Sisi for five days in August 2016.
Werner is a very friendly and hospitable host. Despite our early arrival he was waiting for us to meet and gave us all the details we needed about Vienna. Besides, he lives in the apartment next door, so he is available any time.
Though a bit old-fashioned the apartment is very cosy and practically equipped. There are some charming details that might be appreciated by those who feel nostalgic.
Despite some traffic in the street round the corner we slept comfortably thanks to sound-proof windows.
The apartment is well located as to transport availability ( the underground station is within a 3 minute walk).Unfortunately, during our stay the station was under reconstruction, so we had to use the bus, however Werner had warned us about it beforehand.
There is a supermarket and a mini-market in the vicinity which is available 24 hours 7 days a week.
We can certainly recommend the apartment for staying in Vienna.