We bought our '02 Deville for my wife to replace her Chrysler 300M. It was bought used with 24K miles and we now have 94K on it. We have had all four bearings/hubs replaced, rear shocks, pass. window switch, one tie rod end and the pwr. strg. hose has a slight leak. Otherwise, it has been an excellent drive, smooth but have had the slight front end vibration above 60 MPH as commented by others. Four new Yokohama tires virtually eliminated it. Some of the dash switch lights have gone out but due to the permanent bulb design in the circuit boards, the bulbs simply cannot be replaced without a soldering iron. Engine/transmission are flawless. It uses a qt. of oil every 2000 miles.
Favorite features are the traditional "Cadillac" presence with a car this size. People still turn to look when we pull in for gas. The smooth and near silent ride at 65 MPH. Huge trunk, interior room both front and rear for "real" sized people. And, the relative reliability. We avg. about 22 MPG
The leather seats have not held up as expected, showing too much wear. The minor creaks and clicks from the dash diminish an otherwise hushed ride.