I've been on the MSC Opera fbetween sept 5 -sept 20. I've embarked in Constanta. This was my 5th cruise (3rd with MSC ) so I knew what to expect.
Itinerary was : Constanta, At Sea, Sochi, At Sea, Istanbul, Mykonos, Santorini, Dubrovnik, Kefalonia, Venice, Bari, At Sea, Athens, At Sea, Constanta (might have scrambled the order a bit ) .
Embarkation went very smooth, 15 mins and we were on board, cabin was ready too .