We bought timeshare at the Real Club Gran Caribe Hotel in Cancun. They promised the sun and moon, cheap weeks, etc...
were fakely friendly and then aggressive, practically put the pen in our hands. We signed naively.
Turns out that the fees and charges and costs are much more than they promised. Then they offered a cheaper package, for less weeks, but it would end costing more than buying through any travel agency.
They did not let us read the contract when we signed, saying that they explained everything before. What a bunch of liars.

DO NOT BUY TIMESHARES FROM THE REAL CLUB.