A couple of things to keep in mind when reviewing. Vistana Resort has been significantly renovated over the past couple of years, and quality has improved significantly. It is also one of the largest resorts in the Orlando area, and has a lot to offer - 7 pools, a dozen tennis courts, mini-golf, etc - great if you actually take a day off from Disney. Access to the parks is excellent; but rent a car -shuttles are slow and expensive. Great shopping, and dining are close at hand.
We are owners there, and loving coming "home" for our Disney adventures. Check other threads here for many opinions as Sheila suggests. If you have specific questions, post here and I (or others) will be happy to fill in details.