I have not stayed here but just got the same letter. $299 for 4 nights, 5 days including 15,000 starwood preferred points (not sure what that means since it will be Marriott tomorrow) or a $75 credit at the spa, dinning or for activities. 90 minute presentation that both my spouse and I have to attend and its clear in the T&Cs that your Marriott/Starwood status will not be recognized.

Seems like a decent deal