We have only cruised on Carnival and had wanted to cruise the Mediterranean. When we saw the Vista was coming out in 2016 we booked the cruise within the first week.
We were very pleased with the ship. We did feel that the Atrium was not as grand with the LED funnel replacing the wide open space of other ships. The layout was very similar the the Magic and the Dream and was very easy to get around.
Our cabin was 8339 and we were pleased with it. The only MINOR drawback with this cabin is that it is across from the laundry. We had 4 of us in this cabin and it fit the bill perfectly. Cabin had a mini fridge which kept things cool.
We had my wife and 2 daughters. MINOR drawback to this cabin was that it was across from the laundry.
Acropolis and ancient Athens was great. You only need one day in the city.