Cosi makes a darn good flat bread sandwich, and their salads are great too (so I'm told). The atmosphere is very modern and minimalist. So, although they have free wi-fi, this isn't the place to try to find a comfy couch and surf the 'net all afternoon.
It's a great spot for busy young professionals to rendezvous downtown for a tasty lunch date. Or just a casual lunch with friends with a discerning palate and thin wallet.