stayed at vistana many times, however not all units are the same, the older units such as fountains or lakes are just average, you want to make sure and stay at the cascade area of vistana, these unit are newer and aboustely gourgous. i always rent these 2br/2ba units directly from the owners. you can usually get them for under a $1000 per week easly unless hoildays. it takes only 5(real) minutes to get to epcot, mgm, etc...
so would highly recommend, but specify the cascades section to ensure a great unit.