I spent 4 days with my sister and a friend at Arianna´s place and since the beginning, she showed really disposed to answer any doubt we had. We even contacted by whatsapp. She is kind and polite.
The apartment is really clean and tidy. It's very comfortable and spacious and the advantage of having the kitchen is that you can save some money instead of going out every day. The neighbourhood is typically roman, so there aren't lots of tourists in the area and it's not located at Rome's city centre. Anyway, the metro station (Furio Camillo) is 3 blocks away so you can reach the main attractions of this beautiful italian city! There are also restaurants, a big supermarket and a new shopping centre near the apartment. There's a Rome guide and a map at the apartment that will help you plan your stay at Rome as it is a really big city, with lots of things to see.
I highly recommend Ary's place! Have a good trip and hope you enjoy Rome as we did :)