I agree with nearly all the comments made in the reviews regarding the 1st leg. We felt like 2nd class citizens.
Most staff were under trained but about half were smiling and friendly. Only watchable TV in English was News and documentaries on China's CGTN network. Entertainment was quite poor with the best act being a comedy magician on the night before disembarkation.
No milk or fridge in our cabin. We could only use our balcony when at sea since there was always cleaning, painting & maintenance being done while in port and the balconies on deck 2 were used as a through way for staff so the extra cost for the balcony was not good value. Why does a brand new ship need painting?
Mandatory €10 per person per day (including disembarkation day) for "Service Charge" plus another service charge on any drinks and food purchased.
Mixing cultures and too many languages really doesn't work for me. Every announcement was repeated in about 5 languages and the behaviour of some passengers in the buffet restaurant beggars belief with pushing and piling plates to overflowing with one type of food and thus quickly depleting amount left for other people.
We've sailed with a fair number of cruise lines and therefore we have something to judge Costa against. One gets the impression that Costa's aim was to relieve passengers of as much money as possible. This was the worst cruise we have been on and no way will be sail with Costa again.
Reasonable size. No fridge, milk or coffee: only tea bags both black and herbal. Small balcony that was mostly unusable when in port.