Costa Luminosa is currently under construction at Fincantieri Marghera shipyard. On 5th June it will be launched in Genoa port of Ponte Andrea Doria at the same time that Costa Pacifica, sister ship of Costa Concordia and Costa Serena
So, nobody has any experiencie with this ship.
I supose you are taking Baltic capitals cruise, isn't it? It's a wonderful cruise I'm sure you'll like.
I'm taking Fiords and Cap North with the same ship on 24th July.
Best regards from Spain.