I definatly agree with Robin that the ones inside the hotels are much better. There is also a building by Universal that has one. I have never attended one personally but know many who have.
I think the main thing is how pushy you can be back and how well you can say "No thank-you!" Remember these people are drilled with this stuff and can make it look much much much better than it is!
I'm not a pushy person and I would think I was buying the best thing in the world which is why unless its DVC I'll never go to a meeting for a timeshare.
Some people are excellent at it though.