This location is near my job and it's consistently the lowest priced gasoline in the area. They open as early as 6am during the work week, which is the best time to go in order to beat the crowds. The afternoons are always busy, so plan accordingly. It's a smaller lot, compared to other Costco gasoline stations, and I am surprised I haven't witnessed an accident yet.
My only complaint about the Costco gas stations is their lack of windshield washers and paper towels. But I'm guessing the lack thereof is what helps keep the costs down.