Klaus was very hospitable, he met us even though we arrived very late in the evening. He also gave us nice recommendations where to go in Vienna. The room and flat itself is stylish with a lot of interesting details, just like in the pictures. The only thing is that there is a church (or several churches) really close to the house, so around 7-8am their bells ring super loudly and for long time, so if you want to sleep in the morning, it is gonna be hard.