We adore the Vistana Resort. We stayed for the first time last August and simply fell in love

. Its peaceful and the grounds are gorgeous. The villas a super big, all redone (right down to the studs) within the last few years, have wonderfully high-end finishings (think granite countertops in the kitchen, ceramic tile in the baths, etc.), and all the conveniences of home (full kitchen with dishwasher, washer and dryer, screened in balcony or patio, flat screen TV's, free parking, free internet, jacuzzi tub in the master, etc.).
Location is excellent....just around the corner from DTD. Tons of offsite restaurants within a stone's throw. Super easy to get to all the parks including Disney, SeaWorld and Universal.
The resort itself offers 7 pools (each with its own special feature...two with waterfalls, one with a slide, one with splash fountains, one that shows dive-in movies, several which feature poolside karaoke and evening entertainment, etc.), 6 hot tubs, 2 basketball courts, sand volleyball courts, 13 tennis courts, a "Fishpipe" ride, onsite mini golf, and a whole host of daily scheduled activities (bingo, wine tastings, farmers market, pool parties, resort photo sessions, ....).
This is a great, current thread on the Sheraton Vistana Resort:
http://www.disboards.com/showthread.php?t=3148502
We prefer the resort style properties to Windsor Hills, which has a more "community" feel than a resort feel. But, that's a personal preference only and you might feel differently.
We loved the Vistana so much, we bought two annual weeks there (resale, of course

) once we arrived home. I think you would love it! Our family can't imagine staying anywhere else.