Great coffee and espresso drinks. I think they're the best that you can find in Oakland.
I disagree with the pastry-haters... I actually think this place has better tasting pastries than most other coffeeshops in Pittsburgh! Who cares if they're uniformly shaped? The double-chocolate chunk brownies here are some of the best non-home-baked brownies I've ever had. The apple pastry is awesome, and their chocolate-filled croissant is the second best one I've tried in Pittsburgh (surpassed so far only by La Gourmandine's).
Their food is pricey for lunch (~$8-10 range), but that's because it's delicious and made out of the freshest ingredients! Love their salads and turkey panini. One of the best places (if not THE best) to eat on campus.
The staff has never been anything but super friendly and pleasant with me.
The working environment around the coffeeshop is pretty cute, too, with lots of outlets and natural sunlight, and a nice view of all the gardens outside Gates building. It can get very crowded, though, with undergrads during the school year and class hours. Typically, during inbetween-class times in the afternoon you can expect long lines!