We spent a week in April in Cosimo's apartment. Communication was fast, Cosimo is very pleasant host. We arrived at apartment at 1pm, it's 3 hours earlier then check-in time but Cosimo was very kind and we left our bags in the apartment and went shopping while Cosimo's friend Silvia cleaned the apartment. The apartment is small and cosy, comfortable for couples. Everything you need you find there. The apartment is clean, Ostiense area is nice and quiet, 25 mins walking to Coliseum. The street where apartment is located has parking places which was very important for us. I recommend Cosimo and his apartment!