O'Reilly Auto Parts is known for its helpful and professional staff. Customers appreciate the courteous service provided by employees like Michele, Shannon, and Stanley, who go above and beyond to assist with car needs, from checking batteries to replacing lights. Most reviews highlight the quick service without long lines, making it easy to get in and out. However, there are mentions of mixed experiences, such as a lack of communication about battery checks. Overall, O'Reilly Auto Parts is a preferred choice for many due to its knowledgeable staff and efficient service.