Tickets are easy to buy online, for a reasonable price, and can be changed to another time if you should run late, without any problem. The platform from which the train would depart was easy to find and there was staff available at the station to help with any questions. The service runs regularly and at convenient times, so ideal for when you come to Rome or have to catch your flight back. It is a fast and comfortable journey. From Roma Termini you can easily catch a bus, metro or taxi for your onward journey when visiting Rome. I can highly recommend using the Leonardo Express!