I purchased my STS in January, 2005 and was stranded on the highway by October, 2005 needing a new gear shift. Since December 21, 2006 I have been stranded with a dead battery six times and rough riding with the check engine light twice on Sunday trips of 200+ miles. By the time I get to the dealership after being delivered 5 new batteries in 3 years, the problem cannot be duplicated. Neither of the two dealerships have been able to duplicate the problems so they say there is no problem. There were 6 month intervals from 2006-2007 but 2008 has already recorded January 24, February 18, and May 18.
I love the look of my car. This is my second Cadillac and will probably be my last.