I read the 1% review, and he had to be Italian. This was the worst trip ever. The staff (with the exception of our room aide and the staff of the Taurus Restaurant)) did not smile once until two days before we returned. Not one staff member was interested in helping you unless you spoke Italian.
Got seated next to some wonderful English speaking people at dinner in the Taurus lounge which made the whole trip. They were funny, easy to be with and the staff in Taurus Restaurant were wonderful too. Even the food in Taurus was ok, not great but ok.
The food in the buffett was awful. By the time you were able to get seated, the food was cold. They would shut sections down and make you run circles to find the next section open. There was no fluidity to the way it was run, and seeing wait staff with trays walking around when there were so many dirty tables. We often had to clean tables ourselves just to sit and eat our luke warm food. Also they filled the ice cream machines for lunch and then when they closed a section down, instead of leaving the ice cream machines up and running, they scooped up all the ice cream and threw it away. This was a very hot cruise and leaving them on would have saved money rather than seeing it being poured down the drain. (at least I am assuming they threw it away, after scooping it into buckets that did not look sanitary enough to save).
Our room was exceptional, we were given a mini suite but could not use the balcony because the guy next door lived on his deck and smoked cigars the whole trip, and when I complained, they said there was nothing that could be done (of course not, he was Italian).
The floor plan of the Luminosa is not friendly either, and you find yourself going round in circles or having to go up, just to go down.
The one good comment is the music they played after leaving each port was great. It was the same song but we loved it.
Overall, I would not recommend or do another cruise with Costa because they appeared to cater more to the Italians than everyone who paid to board their ship. I spoke with many Brits, Canadians and Americans who felt exactly the same way.
The Italians were rude, pushy, did not have any manners what so ever. Rules were no saving the chairs on deck which was completely disregarded so there were never any chairs available during cruising time when you have two tables next to each other and one says smoking and the other says no smoking, who tells the smoke to stay on one side or not. So quite honestly, they can have this cruiseline. All rude people onboard one ship at the same time. PERFECT.
So if you want to be treated like a second class cruiser, sail with Costa. If not, Sail any other cruiseline.