This is going to sound strange but I don't go to Enrico's Biscotti for the biscotti. I usually go there Saturdays for brunch and so far I've been happy: the menu is well balanced, the pizza and bread are fresh and the coffee is a-ok!
The ambiance in the cafe is very very nice. You walk a tiny alley, sneak through a door and enter a fairly narrow room with an open kitchen. The best thing is that this is one of the few places where the kitchen is larger than the seating areas. You will get your hot beverages in mismatched cups which adds to the charm and often enough you'll talk to people that are nice to talk to. Last time we were there we got strong recommendations for the lunch goulash and after being prompted to try it with compliments from the chef I have to say that I need to go back.
I did try their biscotti plenty of times and I must say I'm not impressed but then again I'm not a connoisseur.