We have cruised with several shipping companies. Costa is without competition the worst we cruised with so our recommendation is do not throw away your money on this company and its ships.
The food on the ship was really lousy and badly cooked. Of 17 dinners only three approved the other was below standard. Let the shipping company sink to the ocean bottom.
One positive thing, however, almost all the bar staff was very service oriented. In the reception several of the crew spoke miserable English. It is the only shipping company that has raised the Italian language to the world languages since almost all the presentations started in Italian. there is much more to add but this should suffice. Stay away!
A particularly serious problem was that after the crossing of the Atlantic Ocean there came onbord new passengers. According to the regulations so should all the new passengers undergo safety procedures by a safety drill. Most new passengers did not bother to do that. They sat in the bar and enjoyed themselves. If the shipping company claims otherwise they are lying. Consider this is a very serious problem that passengers are allowed to ignore safety exercises at risk for other passengers.
Costa is to my knowledge the only shipping company that allows smoking on the balconies. This resulted in my wife got a burning cigarette in her lap as we sat and have breakfast on the balcony, passengers higher up could not even use the ashtrays available on all the balconies. smoking on the balcony be absolutely prohibited. The ship claim they have a dress code to eat food in both bufferestaurangen as dining restaurants, yet allowed passengers to walk into the dining rooms in swimsuit and evening in shorts and t-shirts without calling attention to this.
The stateroom is fully functional, the problem was that it should be included conditioners and shampoos. At the request of the attendant we were first told that there was no such thing. After showing the information that was in the statroom we got a small bottle of conditioner. If we wanted more we each got time to say it again, nothing happened by it self. It were obviously to us that we passenger were not in focus.