The main story is here, and sidebars on efforts to silence internet critics can be found here (quoting fellow blogger Scott Michelman) and here. An excerpt:
[The consumers] agreed to pay $16,600 in principal and interest, with seven years of monthly $195 installments. In return, Sundance promised 30 weeks of "resort area condominium accommodations" in the United States, Mexico, or the Caribbean – all provided by Sundance's partner, Travel Advantage Network (TAN) of Millersville, Md., with terms spelled out in eight pages of contract language and disclosures.
Looking back, the [consumers] said they felt pressured and misled into signing up for a deal that to them proved nearly worthless. In return for their money, they mostly counted a litany of frustration – particularly that they were unable to book lodging they wanted and faced fees that made a Sundance vacation more costly than other, less-limited choices.
Sundance rejects such criticism, saying its customers freely enter into contracts after salespeople outline all the key terms – including by requiring customers to sign disclosures asking such questions as, "Do you feel your decision to purchase was based on high-pressure sales tactics?"