On our cruise in July with Royal a few days before the end we got a letter about them arranging transportation for various things so we went to guest services and they booked a shuttle to the train station for the 3 of us. I do not remember the cost. It was waiting for us right outside the terminal and we shared it with a couple. We got to the train station and found where to buy the tickets to Rome and then had to see which track the next train was on and have the tickets stamped by the green thing. We had to go to one of the tracks across from where we were so had to go down a set of stairs and come up the other side. From Rome we were getting a train to Venice which we purchased from Italo ahead of time and when we booked those tickets did it for 11 am and bought flex in case there was a delay. Luckily that all worked out great but then when we arrived at Rome Termini it is a huge station and took time to get to the area from where we got left off to the area where the train we needed to catch was and if you need restrooms and food that is another area you have to go so allow a lot of time if you are not staying in Rome and going elsewhere where you need another train.