Slotplayer, you are absolutely right and I should have mentioned that there are fees associated with a comped cruise! They have what they call non-comm fees as well as port charges & taxes. Generally if I don't have a paid upgrade, the cost is somewhere under $300 for a 7 night cruise per person.

And of course, like most mainstream cruise lines they now put the daily service charge directly on your bill, so you will pay (I think around) $12 a person per day for your gratuities.