I first heard of Buffalo Exchange last year in California where I got a Juicy Couture jacket for 15 bucks. It reminded me a lot of Plato's Closet, but with more designer brands and a little more expensive. The one here in Charlotte is similar, but with slightly less higher-end brands. The prices are higher than the average thrift store, but the quality of the clothes are too. It has a really good shoe selection, as well as dress selection.
The only complaint I can think of was finding parking. Plaza Midwood is usually very crowded and the single lot across the street has yet to not be filled. I parked at the library parking lot, which may or may not be against some rule. Still, it's worth it for the awesome finds.