Great location, short walk from the Vatican and a nice stroll away from the bustling centre of Rome. Close to the train station and a number of bus stops (line 64 bus takes you along the main attractions of the city so perfect for getting around).
Flat: really nice and comfortable, exactly as described on the listing; there is a wi-fi device that you can take with you when exploring the city and you never have to be off-line.
Giancarlo is a great host, he gave us lots of really useful tips - great suggestions for restaurants and bars away from the touristy hot spots; places you can sample local cuisine and experience Rome the way locals do.