1st cruise was on Harmony of the Seas
we tried the Navigator of the Seas, as it is a smaller vessel
first part of cruise was very good, until noise/banging started in early hours, which was bad enough to wake us up from a deep sleep,throughout the nights. the vibration could be felt through cabin floor and bed.
last 6 nights of 12 night sailing, very little sleep due to banging noise emanating from under the cabin floor