We all would love to get a free cruise. But many offers for a free cruise are just scams. Here's a link for new cruises to read to avoid these at all costs.
We actually did the time share bit once but we got out in 45 minutes by being VERY assertive and did get the free cruise plus other perks like $50 in cash and free dinner for two. We actually had the guy who talked us into the presentation, initial that we were only required to stay 45 minutes right on our form. Would I do it again? NO! Too much anxiety!