I'm another huge fan of Whole Foods! Having lived in Charlotte before they arrived, I eagerly awaited their opening. Now, I frequent them on a weekly basis. I'll start with the good - tons of local vendors frequently demonstrating and sampling their products, knowledgeable staff that guide you to exactly what you are looking for, huge bulk section (though a bit on the pricey side comparerd to Earth Fare), large prepared foods section (bakery, trail mix, salad bar, hot items, prepared case, food packaged to go), and a great patio to enjoy your meal.
I have two major critiques. The first is that the produce section is surprisingly small. All of the other WFM that I have shopped at always have a very large selection of fruits and vegetables. Here, though, nearly every visit I find myself missing a particular fruit or vegetable that I would expect them to have or being astounded by the price and limited selection. Second, on several occassions I have found hot food bar to be filled with mostly empty trays. I thought they rotated the different options, but it seems that regardless of which day that I visit it's nearly always the same.
Despite a few grumbles, I still love Whole Foods. If you're living nearby the South Park store and haven't stopped by for a shopping trip or bite to eat, you are missing out!