Really, really good coffee and espresso. They do an amazing job with the iced lattes and the red eye is a superb pick-me-up any time of the day.
The food is also quite tasty. The chicken salad is a refreshing treat with grapes, I highly suggest it. The breakfast sandwiches are also quite delectable. Fresh, buttery croissants and the option of throwing an egg and/or bacon on top.
I love the atmosphere. An eclectic mix. Always full of busy looking university students and important-seeming folks from the HR and finance companies up the street.
All of this comes together with comfortable shared work-spaces and private seating/tables (indoors and outdoors.)