O'Reilly Auto Parts in Round Rock, Texas, located at 1040 South Mays Street, offers a wide range of parts, tools, and accessories for automotive needs. Customers praise the store for its excellent customer service, with staff members like Payton and Ernesto receiving special mentions for their helpfulness and professionalism. Many reviews highlight how employees go above and beyond, assisting customers with installations and ensuring they have the right parts. For instance, Payton not only helped with headlight and wiper blade installation but also checked the security of other parts in challenging weather conditions. Ernesto has been recognized for his positive attitude and willingness to assist with battery issues and oil checks. The store provides valuable services such as free battery testing, fluid recycling, and a Loaner Tool program, making it a convenient choice for car maintenance. With over 6,000 locations across the US, O'Reilly Auto Parts is a reliable destination for automotive supplies and services.