Can you find out from your friend which section the unit is in (Springs, Cascades, Lakes, Fountains I & II) to determine if it has been recently renovated.
Also check if the timeshare is a floating week or a fixed week. The older units, such as my Springs unit, have a fixed week every year (coming up for me in less than 2 weeks!) If I don't want that week for a given year, I can turn it into the pool for a trade if one is available.
The newest units (Cascades, I believe) has a floating week within a season (peak, high, and off). Sheraton publishes a multi-year calendar on the owner's website on which weeks fall within those seasons each year. You can use either the owner's website or phone to pick your preferred week. I have another unit at Vistana Villages that works that way.
The Vistana has a small grocerette on site along with a Pizza Hut to go and a few other small restaurants but nothing fancy.
Within walking distance, there are a few restaurants just north on the property along Rt 535 (Landry's Seafood, Lonestar Steakhouse) and a Walgreen's. All are within walking distance. I would not walk south of the property due to the traffic (the Rt 536 intersection is just a block south).