Great place to stay - very clean, a good value and being a two story hotel room was rather unique. Panajotis is best contacted via the phone, rather than texting or emailing ahead of time, which can be a bit of a problem for those from the US due to spotty cell coverage.
The air conditioning really only worked in one bedroom which got very cold so it'd be something that should be fixed. But if that is not feasible make sure there are fans to draw the cold air into the other rooms.
Though it is in the city of Vienna, it was relatively easy to find but the sign for the hotel garage could be larger or marked better. I think it would be nice if all AIR BNB hosts would do YouTube videos of the approach to the parking garage or what have you from the road to better guide visitors.
We recommended Panajotis to family that live in Frankfurt that will be making a trip to Vienna in November and we ourselves definitely would stay there again.