I'm going to the Florence, Italy DO next month. My flights are to/from Rome.

I have the web site for Tranitalia, and am ready to make reservations. I'm not sure how much time I should allow.

My plane lands in Rome Friday, May 6 10:20AM. How long will it take me to clear customs, immigration, and get to the train station? I plan to just have carryon, no checked bags. I was thinking about booking the 12:30PM express to Florence. What happens if my plane is late or I'm delayed and I miss my train? Will they just put me on the next train? What happens if I can catch an earlier train? Can I go standby on earlier train?

My plane departs Rome Monday, May 9 1:20PM. How long should I allow in FCO to get from train station, for ticketing (not sure if NW allows OLCI from Rome), security? I was thinking a train that would get me there about 10:30AM, since I'm one of those folks who likes to allow PLENTY of time. Are their trains pretty much on schedule? I know this is Italy, not Germany, but any info would help.