Pei Wei is semi-fast food, it's not gourmet but it doesn't pretend to be. Its like PF Chang's slightly goofy little brother- its got the same basic ideas and ingredients, but its not as refined. But it doesnt want to be.
That said, I like it when I want something fast to pick up after work that I know will be a good decent meal for the money. Last night I got Blazing noodles with chicken (JD's fav) and some chicken fried rice. For 14 bucks and change we had enough food for an 80's movie food fight even after we were finished eating. Were our taste buds blown away by amazing flavor and pizzaz? Heck no, but we were happily satisfied, carb loaded and ready to drift off to dreamland with a slight odor of soy sauce in the air.