Cristina is a great host, me and my familly stayed at her home and were really pleased. The place is really near a metro station and easy to find, when you come out of the metro A subway at San Giovani, you don't need to cross the road, just continue straight along the building "Coin" near the metro entrance, and stop just after the second traffic light, still on your right the building is in front of you with some restaurants at the ground floor. Cristina will welcom you with a big smile. She is a perfect host.