My mother, my teenager, and I sailed on the Harmony of the Seas for Spring Break 2017. We had the best time ever.
The Harmony of the Seas is the nicest ship I've ever seen: HUGE and with something for everyone. Even my teenager loved this ship. It has a carousel, bionic bar, zip line, rock climbing walls, the Abyss slide, ice skating, spa, HUGE gym, several pools, shows....if you were bored on the ship or had a bad time it's because you wanted to be miserable. There was something happening all the time! Every staff member that we encountered was friendly and SO very helpful. Wait staff in the Grande were our favorite employees and they helped us with not only menu choices, but planning what to do in the different ports. They remembered our names each night and also remembered our preferences, which was great.
We loved Grease (it's a must-see show) and also the Fine Line. I didn't care much for the Columbus show (it was kind of corny) and 1887 was a beautiful ice show, without the hard-to-follow storyline. The late night comedian was HILARIOUS and is definitely worth seeing if you're not easily offended (and if you are easily offended, don't go to comedy shows).
I thought my cabin would be much bigger (hence, the "superior ocean view"). The balcony was lovely and I spent a lot of time on the balcony. I just could have used a bit more leg room I there. We were constantly bumping into the beds.