We found Rosanna's apartment with no problems and it was an easy walk from Roma Termini station (about 10-15mins). We met her friend Jaime who was friendly and helpful and showed us around the house. Rosanna had also provided us with a lot of information about Rome and how to get around prior to check in which was great.
The room is very spacious and having two bathrooms to share between guests is great as there are a couple of other rooms in the apartment rented out. The apartment is a bit out of the way but your are easily connected by the bus/tram/metro network with stops located nearby. The main downside was that the wifi connection kept dropping out which was quite frustrating as we really relied on a stable wifi connection to book further things on our trip and contact our family. Otherwise, decent value for money for a short stay in Rome.