Great place and host. We stayed for a week and totally felt like home.
Stefan was super friendly, early check-in was no problem. A huge bonus point is that Stefan provided us with a portable 4g wireless router that solved all the isues with navigation and etc.
The apartment is very cosy, everything is like what you see on photos, lots of natural light, big room and kitchen. The appartment had literally everything we could need. Stefan provided also coffee and different kind of tea.

The location is great, 15-20 minutes walk from the Stephansplatz. Nearby could be found lots of shops, bakery and a market(5 min walk or faster).

Would totally recomend booking this appartment. Next time in Vienna will try to book this one again :)