I'm a fan simply because it's close to the Duke campus and the ambience is nice. The baristas know their stuff, the music is pretty good, and the art on the walls is done by local artists. It's also a plus that the coffees and teas are eco-friendly. But it can be crowded on the weekends, it's sometimes too dark to see well in the late afternoon, and it can be a little over-priced.
Pros: location, environmentally conscious, good ambience
Cons: a bit overpriced, sometimes crowded