For more info & online tickets from €19 see
A video guide to travel on a Trenitalia ‘Frecciarossa’ high-speed train on the Milan-Florence-Rome-Naples route.
Trenitalia has refurbished its ETR500 ‘Frecciarossas’, replacing first & second class with 4 classes: Standard, Premium, Business and Executive.
This video shows the 4-class train, with shots of each class.
You can book train between main Italian cities at www.trenitalia.com with Super-Economy fares from just €19.
Update: Rome-Milan takes as little as 2 hours 40 on some trains now that the Bologna high-speed underpass has opened!