Our car has been a lemon! Same tire thump as others reported & tires were replaced after about 4 trips to the dealer. Tires also after were replaced did not wear well or last long since can not be rotated. Power steering lines have been replaced. There was a burping noise coming from vents that was horrible as it sounded like someone was passing gas. Again after a few trips to dealer, some type of ventilation computer part was replaced. My car has been in the shop over a dozen times in 2 years. The problems were all "odd" and could not be diagnosed easily so there were many return trips. As other reviews have said when you buy a Cadillac you are not treated as if you buy a Lexus.
The exterior looks! This has to be the best looking car on the market. Gas mileage isn't great but for a nice looking car I get 20.7 mpg which isn't that bad.
Interior size and all mechanical quality. Also go back to 4 tires the same size so they can be rotated. Dealers tell you it doesn't affect wear but all tire dealers tell you different.