We loved our stay at the apartment, it's very central and and there are many restaurants and bars in walking distance. It is located on the top floor of the building, hence the 4th floor and there is an elevator going almost all the way up. There is an equipped 'outdoor' kitchen for those who would like to cook. Nicoletta, the owner, welcomed us warmly and was happy to answer our questions, she made our stay even more enjoyable. Little side note: the rooftop terrace is shared with other guests, so if you are looking for staying completely by yourself then this gem might not be for you.
The bottom line is, the airbnb lives up to its promises; needless to say that the rooftop terrace is an invincible add-on to the listing :-)