We cruised from Civitavecchia to the Greek Islands and back in June of 2011. One of the best things about the trip was the transportation from Rome Fiumicino airport to the port at Civitavecchia - we put our bags down next to the coach at the airport and did not touch them again until in our stateroom on the ship. It was the best $24 we could spend.
The ship, although somewhat old being built in 1993, was comfortable. Our shock came the first evening at dinner, when we asked the waiter for a pitcher of ice water. He said he could not, because a new Costa policy prohibits this. We asked for the Maitre D, and he repeated the new policy. The only way we could get water was to buy bottles of it for $4 each. This is price gouging to the extreme. I have a personal policy of never buying bottled water because studies have found it is no better than, and in some cases not as good as, ordinary tap water. We complained loudly but to no avail. So everyone at the table told the staff that 1. We would not sail on Costa again; 2. We would write reviews about the policy; and 3. We would consider reducing our automatic gratuity amounts.
The next day the Maitre D brought our table a bottle of Proseco (sparkling wine) as a peace offering to calm our dismay. Another day we were given a bottle of wine. These were good getsures, but did not make up for not having a glass of water with which to take medications.
A few other things made the cruise less than optimal, such as the inability of the "Animation Team" to speak English, which was within Costa's control, and the presence on board of some 100 under 5 year old children who pretty much ran wild with no limits due to their ultra permissive parents. It was not fun to try to dance in any of the venues when a dozen little ones were running in circles on the dance floor - no exaggeration.