I went to the Nile Cafe sometime in Fall 2012. Things may have changed since then as they were reopening after closed for a while when I went.
The food wasn't great. Everything is vegan at the restaurant. They have ice cream and possibly other veg desserts (I don't remember exactly). I remember a couple good items, but the rest I threw out because it wasn't edible. There are other great veg restaurants in the area, as the Philadelphia area is one of the best veg places in the country or even the world. Veg food can be just as good as non-veg, but this restaurant doesn't display this.
The staff seemed very nice, however. Also, the Nile Cafe mainly sells water to put into a water cooler.
Cons: Food not great