We are a family of four with our daughters being 13 and 11. We have been on Voyager, Radiance & Freedom Class ships in the past and had been hesitant to try Oasis Class due to the sheer size and passenger volume. Boy are we ever glad that we gave this a chance!! Embarkation was the best we have ever found, Royal Caribbean definitely has this down to a science. We also took advantage of self-walk-off to disembark and avoided all line ups, we were off the ship and through customs in less than half an hour.
Harmony of the Seas is a stunning ship and immaculately maintained. We had a D3 cabin on Deck 14; great design with good storage and a surprisingly spacious balcony; ( two chairs with footstools and a small table). The bathroom is well laid out with a spacious shower.
The entertainment was outstanding; Grease and The Fine Line are not to be missed; booking reservations ahead of time guarantees your seats and we found arriving 30 minutes ahead of showtime gives you plenty of opportunity to select your seats.