Used Dark Rome excursions for touring the colosseum and the Vatican and booked mt own hotel one night before the cruise. Extremely satisfied with that experience.
Tried to take the train to the port for 15€ but the train was cancelled so we ended up spending 135€ for a taxi instead.
Embarking was the smoothest I’ve ever experienced in cruising so far.
Walked around city and found a hop on-hop off bus for 20€ for 2. Nice way to see the city.