Rarely we have encountered a host so involved in making our stay as confortable as possible, right to the smallest detail, even when we confronted ourselves with situations that didn't really fell in his responsabilities as a host, but he was more than happy to help, to the point where we began feeling bad for taking so much of his time. Thank you Ron!
The studio looks even better in real life than in the pictures, very cosy and modern, lots of natural light, quiet street but very close to Naschmarkt, as well as to the Vienna's ring (10 minutes' walk). Also, quite a lot of restaurant variety and shops nearby.
No need for us to waste time looking for accommodation next time when in Vienna ;)