It's nice to have a Greek fast food option, but I think Daphne's is pretty mediocre. The falafel is okay- but it's pretty hard to mess it up. I've made falafel from a mix, and it turned out delish, so I'm sure that's the way they do it here too.
I also tried the vegetarian plate and wasn't really impressed. You get hummus, falafel, spanakopita and dolmas. My fam is Armenian, so maybe I'm spoiled since I've had homemade dolma, but their's sure wasn't anything to write home about.
Prices are okay, and you can make your pita a meal for another $2 or so and you get a soda and a salad.
Daphne's does beat the fast food ho-hum's if you're tired of burgers or Mexican, but it doesn't even stand up to My Big Fat Greek Restaurant in my book.