Jan & Maida are great. They accommodated our early check in and Jan came from his office to meet us.
The place is walking distance to Wien Hbf central train station, Belvedere palace (and its Christmas market), tram stop (only a few stops to Rathaus city hall). The living room and bedroom get plenty of sunlight.
Jan is also very helpful with giving out tips and directions.
We would definitely recommend this apartment. Thank you Jan and Maida.