As RCCL says: "Get out there." Their biggest and newest really is a crowd pleaser, but with such size comes a few minor problems.
The only real "line" was boarding the ship. The 4000+ people pushed Miami's cruise terminal G to the limit. At 1:30, the boarding line was way beyond the endless snaking barrier straps so that those waiting to check in had to cross those in the boarding line. It was a cross between a managed mess and organized chaos, but it progressed fairly quickly once boarding started. Once on board, there were too few giving directions and everyone was more or less on their own. And closed fire doors blocked access to cabins until 3:00.
Baggage delivery seemed to be better than most ships, with only a few having to wait to around late-seating dinner for their luggage.