I really like this place. If you order the falafel pita, fries or a salad and a drink between 11am and 4pm, it will only cost you around $7-8...not bad, not bad.
The flaming saganaki cheese with the warm pitas is really good too and you'll notice that pretty much every table will order one.
They have quite a few vegetarian friendly options, including some really tasty dips, spanakopita and dolmades.
My friend got a chicken pita when we were there and loved that, but that's the only meat item I can vouch for.
This location is fun too, because it's right in old town and easily accessible to all of the bars and clubs nearby.