We're doing just that in just about a month. We have an RCI resort in NC and trade using RCI points. We took a week at SSR the week after Thanksgiving.. This is our first time doing this, and we can't wait..
PP are correct, there is no offer of free dining when trading in, so you'd have to pay for it at checkin (although i think i have elsewhere that this policy has changed recently and you pay when you add it).. Also you get to take advantage of Disney Transportation and Magic Express from teh Airport!!
If you can get one, it's definitely worth doing!