We recently cruised on Royal Caribbean's Harmony of the Seas and had a blast! This ship is gorgeous, and is very well kept. The ships layout is almost identical to the Allure and the Oasis, but with some extras that make this ship even better.
There is a ton of activities for the whole family on this ship. My kids, 11 and 9, enjoyed the additions of the waterslides and the Ultimate Abyss dry slide. They both were fun things to do. The Flow Rider and Zip Line were both great adrenaline- pumping attractions, while the mini golf was the best on any cruise ship. The sports court was great, but always busy.
When we walked into the theater to see Grease and it was almost full, we knew it was good. And it didn't disappoint. It outshined the other theater show, Columbus. The ice skating show on this ship was fantastic and unique to this ship. Both aqua shows, The Fine Line and Hideaway Heist, were super cool with crazy acrobatic stunts and super high dives.
Love the new layout with the closets. Makes the balcony cabin seem much more spacious.