Wife and I had a 3 day cruise for our honeymoon. We loved it. Never got sick, threw up or had any stomach troubles at all. We stopped at the cruise-line-owned island and rented snorkel gear for the day 'inport', not free, but not prohibitive either.
All the people we met/were forced to eat with were really cool -no pretentious attitudes or anything.
The seas were "bad" on the way out, and the ship ("soverign of the seas") rocked a little, but way less than any seagoing vessel I'd been on up until that point (688 class sub, or 1600ton research vessel)
the food was fantastic. Every meal, no matter where you ate, phenominal. Service details were impeccable (animal sculpture towels on bed, clean, polite staff....everything- the cruise lines know how much they cost and they deliver.

I'd go on a cruise again, but given that a 3 day cruise (on anything) costs as much/more than my car, it probably wont happen again...ever.

I WOULD have paid extra for the "tour of engine room and bridge", but I don't think they were offering that as an option =)

I'd recommend going on one if you havent - wife and I loved it. Just do 3 days, feel like an earth-killing demon (all that diesel fuel....Noooooo !) and then go home =)

If the earth was taken-over by mercedesshoppers (oh sorry, Peachpartsers) and the cruise lines went out of business, I wouldn't cry, but I would miss their big machines.

-John

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2009 Kia Sedona
2009 Honda Odyssey EX-L
12006 Jetta Pumpe Duse
(insert Mercedes here)

Husband, Father, sometimes friend =)