I got a firm reminder as to why I prefer O'Reilly's over AutoZone when I came in here a few weeks back. The customer service is ghastly. I came in to AutoZone to return a filter removal tool that I had bought a week before from a different location that didn't fit. The cashier that I worked with was rude a curt with me when I mentioned I wanted to return the part, giving me an irritated look as if I was bothering him. Didn't bother to talk to me at all throughout the return and bruskly gave me my refund. I would say maybe this particular employee was just having a bad day except that this seems to be the norm when I go to any AutoZone which is why I only come to one if I can't find a part that I need immediately at O'reilly's across the street.