The flat is very clean, neat and spacious. Vivi's mother is very very kind and her english is good. She was very flexible and punctual on our departure.
The flat is situated close to a university in a lively neighbourhood without tourists! Plenty of bars and restaurants with very OK prices. Super breakfast around the corner at Bar Leonardi. Good connections by bus to anywhere. Within walking distance of the oldest gelateria in Rome, Fassi (try the fruitflavours, particularly mandarine and melon, sooo good).
Only minus for us was having to sit in the shower (or turning the bathroom into a swimmingpool) and that the apartment is very noisy: you could hear the neighbours argue through the walls. We're not used to that.
All together we had a great stay. Rome is fantastic!