The communication was clear and directions easy. However, if you want a cheaper option, take a Cotral bus to EUR Magliani train station (2.80 if you buy from the newsagent's, 7 on the bus) and then switch to the metro train (only 2 stops from there). If you take a train from the airport, it's 8 euros.

Marzia's place is clean and has lots of space. The city is some stops away (metro very near), but easily reachable by train (one way 1.50). If you like to cook for yourself, a supermarket EmmePiu is just a two minute walk away (turn left) and it has lots of choice. City centre doesn't have that much food shops.

Note that you also need to pay city tax in addition to the apartment.