Exchange thru RCI to the Cayman Islands

Hi there.
Just wondering if anyone has ever had any success with getting an exchange vacation to Cayman Islands thru RCI.We are looking for Jan or Feb 2012,,must travel then, there are 4 of us.

Moritt's Tortuga comes to mind, I had it booked one year but had to cancel it for some reason. Ended up going to Cayman Island on a cruise stop one year, fun place, and divers especially like it there.