Excellent

First of all, Royal Caribbean is a great cruise line because it offers a variety of activities and entertainment to satisfy different interests.  There are fun activities and games happening during the day by the main pool area (which is large enough so you don't feel like a sardine stuffed in a can, and there is a separate pool for kids, so their loud yelling and running is not bothering anyone), and a variety of activities happening inside the ship for those who don't want to be at the pool.  There is always something for everyone to enjoy.  Many games you can participate in and watch others.  There are gorgeous shows in the evening in the theatre, as well as more games and activities happening in the bars and lounges.  There is live music and disney dreamwork characters for kids to take pictures with or simply enjoy watching them dance and play.  Food is great and there is lots of it. It is very unlikely that anyone would be bored on this ship, even during the sea days.

Second of all, the destinations on this cruise were amazing.  St Thomas and St Marten are beautiful islands with gorgeous beaches.  And Coco Cay (cruise line's private island) is gorgeous as well, with a few different beach areas for snorkeling, swimming, playing, or just relaxing and getting a tan.  We took excursions on St Thomas and St Maarten, and both of those were amazing, staff was friendly and happy to assist us, and activities were well worth the cost.  

I would definitely go on this same cruise again, but first I want to check out other destinations.  There were many people on this cruise (frequent cruisers), who have already been on this same cruise before, and some even more than once.  Many people were saying that St Maarten and St Thomas are two of the most beautiful destinations, and that's why more experienced cruisers, who have seen it all (or almost all), prefer going back to these islands.