I stopped at Zinc because it appeared to be the higher end restaurant in the Southwest section of the airport. I ordered the Zinc Burger and a Mountain Dew. I took one star away because the waitress brought a coke out at first. The second because I asked for medium rare, but the burger was clearly medium (no pink whatsoever). The third because the fries were very oily and overcooked. I'd give it another shot if I have another long layover at Phoenix.