Just signed up for the 6 day 5 night package for $679 which includes a $185 credit for an Avis car for the 6 days, plus $75 resort credit or 5000 SPG pts. The room is not in the timeshare building, instead it's in the regular Westin nearby. TS presentation required. Also, $30/day resort fee including parking, etc. So, basically $130 per nt all in, less the value of the 5k SPG points.
The email conformation lists a phone number of 888 272-0375 to call to book the dates, as I wasn't sure when I would go, so just paid the $400 deposit. 8am to 8pm M-F PDT.