We stayed for 4 nights in Oct 2019. The apartment was better than we expected. It was big and clean. Looked exactly like the pictures. The location is very good. Very near to the metro and is along a street that has both eateries and shopping (McDonald's and H&M are literally at the doorstep), as well as a supermarket nearby. It can be quite noisy at night with night-time revellers but you can't near the noise if you close the windows. We were touched with the welcome chocolates Viktor prepared for us.
Viktor was also very flexible on the check-in time as I requested for earlier check-in but could not confirm the exact time till the day itself. He was very accommodating. He was also very kind to allow us to check-out abit later as I had to go back to Stephanplatz to get an item which the saleslady had forgotten to give me as part of my purchase.
All in all a wonderful experience and will stay in Viktor's apartment again if we have a chance. Strongly and highly recommended. :)