We land in Rome at 8 am and will stay our first night in Siena. Reading older posts, I see that the Flix bus is a good way to go. We are renting a car in Siena (or possibly another Tuscany town) to get around before taking the train to Florence a few days later.
Question: getting from the airport to Rome Tiburtina - is this best by train or bus?
If by train, can I just buy the ticket from FCO to Tiburtina on the Trenitalia app?
Does this eliminate the stress of validating a ticket, as I've read?
Thanks for the advice.