I hadn't been to a Pei Wei since I left Arizona, moved to California, and realized that Asian food was supposed to taste like. That said, there were one or two dishes here that I quite liked, so when I was at the Vegas airport and options were limited, this seemed like the best of the choices we were presented with.
The selections were limited, being an airport location. The service was average. The food was REALLY oily here today, to the point that my friend didn't feel well after eating here.
You're probably better off getting a powerbar at the airport convenience store, and waiting until you land to get real food, elsewhere.