I can't tell you much about the quality of the gas, but I can tell you that the gentleman behind the counter will be happy to help you select their finest bottle of Riesling with a screw cap.
I was staying at the Charlotte Airport Sheraton next door and there happened to be zero options other than the marked up hotel rape service and the mediocre in house restaurant/bar.
So if you're stuck in the middle of nowhere, this little station has a fairly stocked convenience shop where I was able to score some snacks, gum, and white wine before meeting a friend to hit up the gay bahs.