Vidanta has quite nice properties and provides a good vacation experience, but whether buying a contract with them is right for you is a very personal question. The sales teams are quite aggressive and persistent and the company has set things up well to reduce resale of the more current contracts. (You can occasionally find an older contract that has less onerous restrictions and is worth getting resale, though those will be in the lower tiers like Mayan Palace or Grand Mayan - still good places to go, though.)
There are a few things to take into account - Vidanta built and is building their resorts to support the high seasons (Thanksgiving, Christmas, Easter, Holy Week, and January-April). There is a fairly steep fall off in demand outside of the high seasons, so if you are likely to enjoy traveling there in the shoulder and low seasons there is generally plenty of availability in the various exchanges (e.g., ThirdHome, The Registry Collection, II, RCI, and SFX). While there are resort fees charged in addition to the exchange fees, it can be cheaper to exchange into Vidanta than it is to pay a usage fee as an owner. There are some additional perks as an owner, meaning that you have to figure out which is more valuable to you if you do buy there, but the cost difference can be substantial.
Finally, you'll get a lot more feedback on this subject in the Mexican Timesharing forum. A moderator could move this thread there to help out.
@Karen G ?
