Hi All,
Markus is extremely friendly and helpful host. He shares valuable hints like what is wort considering while visiting Vienna.
In terms of the place itself, it is nicely located in the city center.
Like given in the description, be aware that is located on the top (4th floor) and it takes a bit of effort to get there as there is no elevator available (also explained). Talk to host before coming as getting the keys was a bit challenging, however Markus mentioned he is going to re-think the concept.