I work across the street from this little place and it is pretty good. They have a modest stock of foodstuffs from the former eastern european countries. Interesting cookies and sodas. The coke wannabe made from the fruit of the dogberry bush - yeah, the dogberry bush - didn't go over too well with my kid. I thought it was OK.
Very friendly folks, and your sandwiches are made to order as you wait with plenty of opportunity for input from you. The house special sandwich, as mentioned in previous reviews, is the best thing on the menu. The roll they make it on is exceptional. The veggies they put on it, including thinly sliced bell peppers, are extremely fresh and crisp, which adds great textural dimension.
If you are looking for a fresh, delicious sandwich served up by pleasant people who actually look you in the eye and have a conversation, Z's is your place.