Perfect location to visit Wien.
Bedrooms are big and comfortable.
The communication with Christian was uncomplicated. He was flexible for check-in and check-out which we very appreciated. He gave us nice tips for restaurants :)
My only "complaint" would be that the kitchen is not very comfortable to chill in the evening but for a short day it's not a problem at all since we were most of the time outside!
Because of winter time we didn't use the small garden but it looked cosy for summer time.
All in all I'd definitely recommend this place to visit Wien.