Sam's Club Gas Station in Castle Rock has shifted to a members-only fuel station, offering discounted prices reflected at the pumps for members. Customers with a Sam's Club card can conveniently pay using their phones at the pump, making quick and easy refills. The station is appreciated for its affordability, often offering the cheapest gas in town, making it a good value for families looking to save on fuel and other essentials. Visitors note that the station usually has short lines and helpful staff, contributing to a pleasant experience. However, during busy times, some mention that people tend to leave their cars while filling, which can slow down the process, and suggest attendants might need to manage pump activity better. Overall, Sam's Club Gas Station is viewed as a convenient, cost-effective place to fill up, especially for those with a membership who want to save money and enjoy efficient service.