The fourth and largest (by a smidge) of the Oasis-class ships, the Symphony of the Seas sounds musical notes when guests tread on the staircase to the Windjammer Cafe. The two-level Ultimate Family Suite connects upstairs and downstairs with a kid's slide. El Loco Fresh and a new seafood concept are firsts, as is Playmakers Sports Bar and Arcade, with a selection of craft beers.