Before we went to Rome we thought that we were gonna stay with the host (because it's a shared type of house) but it is not. It seems that many places in Italy and their rooms are rented to people as a "hostel". So we were staying with the other roommates at house. Be aware of that before going!!
We didn't see Rosanna at all but she contacted by Airbnb message when we need something. The cleaner guy is coming everyday to clean the bathroom that the house is so clean.
If you are looking for a central place this is not for you because it takes time to get to metro then central!! Also at nights it's a little noisy because its location has lots of students who want to drink and have fun all the time.