We like Cosi for it's flavorful, healthy, reasonably priced food. I especially liked the whole grain flatbread to accompany my bowl of tomato basil soup, so when last I visited and found that the "whole grain" flatbread did not have the expected whole-grainy goodness, my spirits were flattened. Why, Cosi, Why?
Great breakfast sandwiches. Good portions, and walkable from the Marriott. Open early enough to accommodate breakfast before most events.