Circle K is a clean and nice gas station, considered the best in Boulder by some. Reviews note the friendly and kind staff. It offers a gas discount card, a drive-through carwash, working vacuums, and an air pump. The store provides snacks, candy, essentials, and consistently fresh fountain pop. Some customers report a very positive and consistent experience. Criticisms include required TV ads at the pump, occasional cluttered walkways, and a desire for improved landscaping with new trees. Overall, it is a preferred location for many despite minor inconveniences.
