This location is usually very busy so I have never been motivated to stop in. I had take-out from here once and thought the hummus was so-so. I hear from an Israeli friend that the hummus here is extremely authentic but it's just not my thing. I'm guessing this is because, despite being authentic, it's not as fatty, sweet, and salty as the Americanized versions I've likely grown accustomed to.
I've had a number of sides at the St. Marks location (which is less busy), including the stuffed grape leaves, healthy salad, and falafel, and enjoyed them. I'm assuming the items here would be the same.