The room was just as described. The flat is situated in a nice neighbourhood, supermarkets, bakery, pharmacy, restaurants and everything else are nearby. Within a 15 minute walk, you get to the main station, where you can take the Metro or trains to other destinations (e.g. the airport). We mainly explored the city by foot though, which is possible.
Rosanna was kind and offered everything we needed (coffee, towels...). She is experienced with visitors and has some herbs, tea and coffee as well as maps ready for you. The kitchen is used by everyone (the maximum people we stayed with were 5 and it was fine), as well as the two bathrooms. Everything was clean and we felt comfortable. You should only think about bringing airplugs, just in case (you don't know who is staying with you and it might get a little louder in the night).
If you want to save money and to explore Rome from a nice neighbourhood, this is a good choice. We met nice people in the flat and were really happy to stay there.