RC's Harmony of the Seas is a wonderful ship. Like all Oasis class ships, some might say there's too much to see and do, but if you go in with the right mind set, and look for the things that would interest you, you can find time to do it and have a lot of fun.
Having previously sailed on Allure, I knew where to go and where to avoid. We had a Oceanview Balcony cabin. Nice, quiet, private. Now if you don't want privacy, but and don't mind a little noise during the day, a Central Park Balcony could work for you. If you like the noise or a night life person, go with a Boardwalk Balcony. Cause there can e a lot coming from the Boardwalk area, be it the music from Johnny Rockets, or from up above on the sports deck, the amount of people possibly coming from an aqua theater show at night, there's a lot of noise there.
Or trip went to St. Maarten / St. Martin, the island looks fairly good a year+ after Irma came through.
The hike up the observation tower, though painful, cause it's a good 4 or 5 stories, provides a wonderful view of the NE coast of Puerto Rico.
10 rides on the Dragon Coaster, could have done more, but 10 was a good number.