We'll be on this cruise, too! It will be me and my wife, along with our 21-year old son and my mom.
This cruise is to celebrate my son's graduation from college. He's going into his senior year this year, so here's hoping he actually graduates!

My son specifically requested this for his college graduation, just like he did for his high school graduation.
We've done the eastern Caribbean before in January 2016 as part of a repositioning cruise from Galveston to Puerto Rico. We actually would have preferred the western Caribbean this time, but the dates for this cruise worked out better. In particular, this cruise sets sail less than a week after my son's expected graduation and two years to the day from when I booked our OBB placeholder.