I'm not very well verse in Italian specialties, so I can't comment on the authenticity, but this place seems legit. They sell everything Italian from the bakery (wide variety of breads, antipasto, sweets, packaged snacks), deli meats, coffee and sandwiches. If you want a speciality snack, this is the place to go. Seems like a lot of locals come here.
I got a tiramisu and an amaretto crescent cookie. The cake is very frothy and sweet, I only had a few bites because it was rich. But you can really taste the coffee, and the cookie has a strong almond flavour as well.