We've used The Sheraton as well (tel +39 01065 49006 - Fax +39 01065 49015). Speak to Paulo Solari.
Good packaging and presentation. They charge approx 20% extra for less than 24 hours notice. But at least you're not taking the risk of a 'handling agent' bodging some 'catering' together which shouldn't happen (but unfortunately does at some UK airports/fields !
