There is an easy answer for why I wouldn't want to own Vistana in Orlando. It's too easy to trade into, and most of it is not the quality of Vistana Villages, which has pretty high maintenance fees.
Sheraton Broadway Resort deeded weeks, 2 bedroom and 2 bedroom lockoff units, have great value. They trade into Hawaii resorts, which is great, historically. I have had great luck with trading into Westins, but there are no guarantees, and Interval International just downgraded our trading power on everything we own, including our Marriott and Sheraton weeks.The downgrade happened a few months ago. I don't know what the future holds for exchanging. It seems more a crapshoot than it has been in the past.
I wouldn't fall for any spiel about Sheraton Flex. We attended a presentation while at Sheraton Steamboat Springs this summer and I had to tell the guy upfront that Sheraton Flex has $0 value resale. He was not happy with my saying that.