Thanks for everyone's detailed responses!
I have no intention of ever buying a timeshare--I just want to do the Tahiti Village presentation so I can stay in Vegas for free a couple of nights. I'm from LA, and since Vegas is only a 4-5 hour drive or a $39 flight away, the only thing I really ever spend money on is hotels. Since I go to Vegas at least 4-5 times a year, one free 2-night stay would be really great.