If you are lodging near Rome airport beware of extra charges at the Marriott Courtyard. They are now charging 6 euros per person for their shuttle to the airport, about 1 mile away. Taxis are expensive from the Courtyard and they are not near a metro or train stop, so they really have you with this surcharge. If you are staying there, add 24 euro for a couple to your room rate to cover your trip to and from the airport. i suggest Holiday Inn in Parco di Medici or one of the Hilton properties. They offer free shuttles and usually have equivalent room rates.