I'm with Tao on this one - what course/itinerary the Cruise Line has in mind, only they can answer. As to whether a particular cruise on that particular line is 'worth its while', can hardly be answered by cruising sailors - the experience of a passage
on a cruise ship
and a small boat are completely different.
Once you find out what ports
they intend to visit, some here may be able to assist with suggestions on restaurants/bars/sightseeing ashore, but as to the passage
or the ship, this is not the place. Take heart, however, I am sure that there are some cruise-line specific forums
that can give you some insight from people who have actually taken the trip.