We owned two timeshares until about last year when we basically gave one away on eBay. They came with my marriage, LOL. The one we've kept is Williamsburg and since we enjoy Wburg a lot, it makes sense for us. However, we've exchanged it the last couple of years and one of the trades was for our trip this past week, to the Vistana. We were in the Cascades section, which is really lovely. Everything is very clean and crisp and new. Elevators are nice as well, since we come in dead at the end of the evening.
That said, the other sections may have better views of the fireworks at the parks. We were on the 4th floor and at an odd angle so we couldn't see anything.
We also spent next to no time in the resort. However, a lot of people swam despite the not-so-warm weather and there were always people all over the resort. If we had two weeks, I could see spending a lot of time there.
As someone mentioned earlier, getting in and out of the parks couldn't be easier. I mean, minutes to the parks. The only way it could have been faster would have been to be on the monorail line or at one of the closer Epcot resorts. (That is, if you arrive early and park close by.)
At check-in, they have these nice young people making balloon shapes for the kids, which was a nice touch. They have various activities during the day and a place to leave your kids if you need to spend some adult alone time.
All-in-all, we were quite pleased with our exchange.
We've stayed in Wales and in England (Yorkshire) with exchanges also. Those were the best bang-for-the-buck if you ask me. You really have to play the game to make timeshares pay.