O'Reilly Auto Parts in Mayville, Wisconsin is a well-stocked store that offers a wide range of parts, tools, and accessories. The store provides excellent customer service, with helpful employees who are knowledgeable and willing to assist customers. Customers can take advantage of various store services, including free battery testing, wiper blade and bulb installation, fluid recycling, and check engine light testing. The store also offers the convenience of a free Loaner Tool program and the ability to resurface brake rotors and drums, as well as make custom hydraulic hoses. While the majority of the staff is praised for their great service, there is one employee who seems to struggle with customer assistance. Overall, the O'Reilly Auto Parts store in Mayville is a reliable and customer-friendly establishment.