If I remember correctly the 2009 370Z won the JD Power Best Initial Quality for a Sporty Coupe award. I think the category is specific enough but not tailored just to let the Z win. My 2009 370Z 7AT w/ Sport Package has had zero failures beyond what can be considered wear and tear. These are street cars with some track capability so when you flog the car pretending to be on a track you can expect to have to replace some key parts.
I always crack up at folks that buy a Z and then complain that its not what they really wanted and then emphasize the very few bad things they have encountered and bash the very car they drive. For Batman's sake go buy domestic and then see what level of quality you get. Damn...