My wife and I each have a 2006 Cadillac STS V6 because I feel strongly that I prefer to buy an American car. Unfortunately, my car has been into the shop four times to have trim pieces put back on, and there is a distracting amount of wind noise which cannot be resolved and apparently is just the way the car is. My wife's previous car, a Lexus, was whisper quiet, so we're not used to this. If GM wants owners of BMW and Lexus to go to Cadillac, they will have to do some major work on the entire way they build cars and treat their customers. I also own a BMW Z4, and having had this plus the Lexus, going down to a Cadillac has been a shock. So I'm not saying I won't get another one, but the jury's still out.
I like the size of the exterior. It is big enough to feel substantial, but not clunky. The car is fun to drive.
The fit and finish need improvement. The driver's compartment is cramped. The odd sized trunk opening makes getting a large piece of luggage into the trunk impossible.