I work in the area and don't always have time, or care, to pack my own lunch. Plus I don't cook and you can only eat spaghetti so many times a week.
This is why I love The Duck. It's two blocks from my work which gives me a little "wake me up" walk and the outdoor seating is nice on the days when it's not too hot. Yeah a sandwich will run you just under $10 with a drink but you get a massively huge sandwich. Some days, I end up taking half of it home and eating it later.
I always get their Avocado sandwich because I'm a vegetarian and it was so good the first time I was here that I've been unable to try anything else lest it not compare. Co-workers of mine are fans of the curry chicken salad.
There is plenty of seating so I usually suggest this place when meeting friends for lunch.