$66.5 a night per person is the cheapest price I have ever seen a Cruise.
Remember it includes unlimited food and non alcoholic drinks, accomodation, port days at 4 beaches, entertainment(shows, comedy and music) and gym.
Interior Twin room $665 is booked out
$672pp Quad Room
That would be unlimited very narrow range of non alcoholic drinks. Don’t expect sodas or juices.