99.9% of the time I go here for the fountain drinks. They have a big selection of flavors and any size up to 44 ounces is 79 cents (plus tax)! Great deal. The staff are usually very friendly and overall the place is pretty clean.
My only complaint, the reason I only gave 3 stars, is that the "Froster" (Circle K's version of the Slurpee) machines are NEVER working. My kids love them, but the machines don't ever seem to work. Fix the machines (and keep them fixed) and I'll change my review to 5 stars.