My family and I, including grandparents, recently cruised on the MSC Seaside last week. My kids are 16, 15, 13. We had a fantastic time on board and would definitely do this cruise again. In fact it may be hard to go back to other cruise lines as this ship has set the bar high. Our itinerary included, Ochos Rios, Grand Caymen, Costa Maya, Cozumel. Here's my thoughts on the ship/ itinerary.
The ship is gorgeous! You feel like a million bucks just walking through it! There is not one area that is not beautiful in design. Even though it is a big ship, we never felt crowded.
Tip: Like most ships, on sea days book your deck chairs early.
It was beautiful, new and clean! No complaints.