The employees at Advanced Auto are well qualified. However the parts are questionable at best. I recieved a coil pack from there recently and replaced my old one and still recieved no spark. So after trying a new crankshaft sensor, wires, etc...I resorted to the coil pack once again from another place. Worked..Cost and labor..they should give me around 130 bucks. Thanks for the bad part that some other person will im sure be buying off you in the future.