The apartment was very confortable and close to the city center. I liked very much the atmosphere of the Naschmarkt and of the many touristic attractions nearby. The apartment is very spacious and it is ideal for families or groups of friends travelling together. Also, it has the typical flair of the "Wiener Altbau" (Vienna old style construction).
As to my hosts Eva & Michi, they were super kind and accomodating to me. They were very fast in replying to my enquiries and gave me a lot of very useful tips about the city.
I would absolutely reccomend this apartment in Vienna to other travellers!