Pei Wei is the fast food version of P.F. Changs. When I say 'fast food', I don't mean there is a drive thru, the food is pre-made, and deep fried.
P.F. Changs took a bunch of their more popular dishes and created a more casual atmosphere for the 'on the go' person or family.
How it goes:
Walk in
Check out the menu
Order at the counter
Take a number
Grab a seat
Food will be served at your table
The food is just as great, the service different because it requires more work on your part, and the meals could be a few bucks cheaper. Other than the cost, I would have given Pei Wei 4 stars.