We purchased HAL's transfer to Rome and spent the day on our own. We were six traveling together and we rode HAL's bus to Rome from Civitevecchia where we were dropped at a central location. We then had the whole day to spend where and how we wanted and were back at the drop off spot for the ride back at the appointed time. It was well worth going that way and I'd do it again.
We had been to Rome many times in the past so knew exactly where we wanted to visit with our friends..... their first time to Rome.