I received a mailing the other day about one of those 90 minute timeshare presentations. If we attend, we supposedly get a free cruise for two on either Carnival, RCL, or NCL, 7 nights, Mexican Riviera. I called and the rep said we just have to cover the airfare to the port and tax and port fees (around $300 per person). Does this sound to good to be true? How can there timeshare companies afford to offer this? Any other catches? I have no plans on purchasing a timeshare so we would just go up there to sit patiently through the presentation, but I don't want to waste 90 min of our time if the deal has some hidden catches.