A while ago I wrote a critique of the 2014 Chevrolet Impala's styling noting, among other things, that I thought the passenger compartment "greenhouse" occupied quite a large share of the car's length. It turns out the the Impala shares the same body platform as the Cadillac XTS, introduced for the 2013 model year. GM stylists did a good job of disguising the shared platform: the cars have different styling personalities aside from that inescapable long greenhouse and the proportional effects it introduced to both cars.
So the Cadillac XTS has a lot of good detailing, I think. Do these details make the overall design a success? I think not. Like its sister Chevrolet Impala, the XTS suffers from that long, long greenhouse that throws the design off-balance. Worse, the comparatively simple side sheetmetal serves, along with the greenhouse, to create a large visual "dead-zone" between the wheel openings. When I see an XTS in person, I usually get a sense that something is wrong. In this instance, the details were unable to rescue the form.