We chose the MSC Orchestra (sailing 05 June 2016 from Venice) primarily for the itinerary - Venice, Bari, Olympia, Santorini, Athens, Corfu and Kotor. The price was a bonus as well, with a balcony stateroom and round trip air for less than £2,000 for the two of us. I will try to make this review as honest as possible, and please remember that these are my own observations. It seemed other passengers had slightly different experiences.
Itinerary:
In a word - incredible. There was a port every day, and 4 of the 6 days, we arrived late enough to be able to have continental breakfast on our balcony, so we did not need to fight through the buffet. Tendering was done twice (Santorini and Kotor) and seemed fairly straight-forward.
We had a standard balcony (booked the Fantastica Experience which provided us with free room service delivery if we wanted. The cabin attendant was always ready to help and did well in cleaning and flipping our cabin.