A spark plug broke in my Miata out in the middle of nowhere. Took it to Cardinale the next day and they got right on it and had it up and running in no time. Really took time to go over the engine and check everything out. It sounds great - runs smoother than it has in a long time. I now realize that the spark plug had probably been going bad for a long time - but I didn't know it. I just thought the rough idling was a normal part of a 7 year old Miata. So why didn't the other dealer nearby ever catch it? The car has been there twice in the last year for oil changes and they never said anything. But they couldn't identify a road noise as being a bad wheel bearing either. But Cardinale did and I'm switching to them permanently for Miata maintenance and repairs. Very nice, friendly people there, too.