Zenith is one of our Fav's. Older now than the rest of the fleet, but I understand holding up quite well. It had the first martini lounge in the fleet and has hot tubs on the top aft for those lazy afternoons at sea before supper.
Mid ship elevator goes to the deck below the pool so get used to using fore and aft elevators to get to the pool deck.
Nice sundeck area's aft of some cabin decks. Kind of like your own area if you find them. Fleet bar (I think that's what it is called) topforward is the spot for after dinner drinks and dancing.
Great ship enjoy..