The difference between RCI and others: Great ships - and you need to take what they offer.
So out of 80 cruises only 4 were with RCI: Sorry - but their service level is just not ours.
Once in a lifetime I wanted to the the largest ship in the world. But honestly spoken I do not need it.
Great for the Aqua Show. But make ways too long across the ship.
We did by ourself: Da Michele (12.00 hrs only 10 minutes waiting time) - Fort - Gambrinus. Was fine.