Espressamente Illy has the best croissants I have ever tasted but you got to get there before lunch though, it finishes quick. Sometimes even before 11am. The croissants are nice and crisp with a nice smooth and buttery inside. You can just eat it plain. It comes with butter and a choice of strawberry jam or marmalade.
Their Caffe Fondente (basically a mocha) is magical, the rich chocolate with the aromatic coffee topped up with milk is just amazing. You don't have to add any sugar for the chocolate is enough to sweeten the drink and it comes in a really nice glass (something like a martini glass but shorter and with a bigger base).
This coffee shop sells cocktails too, their Long Island Ice Tea is the best I have ever tasted (and I've tasted plenty), this is because they whip lemon sorbet in it giving it such a nice flavour, the alcohol and the nice balance of sweet and sour is perfect.
Another one of my personal favourites is the Penne Pesto, I just love their pesto. The penne is cooked just right and the pesto is extremely smooth and has strong aroma and flavours. The basil, pine nuts and cheese come together nicely.