The Mongolian Beef from Hot Wok has become one of my favorites, It is one of the spicier dishes you can get in Flagstaff (admittedly, there are places I haven't tried yet). The beef is tender and very flavorful and the vegetables are nice and crunchy. It's just the way I like it! Hot Wok's Pork Pot Stickers are some of the best I've had.
The only complaint was that the Beef Noodle Soup was a little bland, though the Noodles (which came in a separate container so they didn't get soggy from over-soaking) were very good.
Delivery was quick and our food was still at a good temperature when it arrived.