The Vistana is a GREAT resort. It's huge. Many pools. Very close to Disney, and roughly 20 minutes from Sea World and Universal. The location can't be beat (well unless you stay onsite). We love the Vistana. Have stayed there 3 times. Always very pleased with service, amenities, and the condition of the unit. The grounds are beautiful. Many ponds and fountains all over the property. Several restaraunts right there. Also close to the Crossroads plaza which has more places to eat. There's plenty for kids to do. In addtion to the pools there is mini golf, tennis/basketball/shuffleboard/volleyball courts. Also planned activities for kids/teens/adults each day. Family karaoke by the pool a couple nights a week, with a big barbecue, in addition to many other activities.
If you have any other specific questions ask away!