I had some major repair work done (Head Gasket and Valves) two weeks ago. On my way home, the check engine light came on. My friend's "code checker" said that Cylinder #4 was misfiring. I waited a few days to see if maybe it would work itself out (followed LG Auto's suggestion to try Premium gasoline to clean it out a bit first) and finally had to bring it back in. To drop off or pick up my car with my family of 4 is quite a hassle and I wanted to make as few trips as possible. They found the source of the mis-fire (a crack in the line unrelated to their previous work) and fixed it for FREE. The car is a 2004 Buick with a LOT of miles on it, so no doubt it's got quite a few worn out parts. They drove it around some and decided to switch out the ignition lines, too, for FREE. Then, on the day I was to pick it up, they offered to bring it to my place of work so I wouldn't have to go get the keys from them first before dragging my family out again. They had to take 2 guys out of their garage to bring me my car (time = money) and when they arrived, it was the owner himself who stepped out to give me my keys. When I thanked him, he smiled and simply said, "It's just customer service."