My experience has been better than Don's, but Cadillacs are not without problems.
1989 Cadillac Sedan DeVille (Consumer rated 9.0). Ran it 130,000 miles with 2 problems: 1) ECM computer chip went out ($600 for Cadillac to repair - took a chip out of an ECM at Brandywine auto parts for $5) 2) Front motor mount went out repaired at Cadillac - cost was not significant - recall about $200 - easy in the front - hard in the back.
1996 Seville (Consumer rated 8.0) We ran it 140,000 miles and sold it for $3,000. We've seen it around so it is still running. Needed a significant tune up at around 100,000 miles. Heater hose blew out. No other problems.
2000 Seville (Consumer rating 8.3). It has 120,000 on it and is running well. Gas mileage is about 26 on trips - V-8 - gearing ratio is economical. Some guy wrote a review on Edmunds and said he was getting 32 MPG - no way.
1) It had a short in the wiring harness (repaired by non-Cadillac dealer) $100. 2) Thermostat went out (bizarre OBD II code) - a lot of crap has to come out to get at this - was $1200 including a new water manifold gasket, water pump (good while it is apart), and the thermostat. Non-Cadillac dealer repair. The thermostat that the shop got from Cadillac was bad and they had to redo the job - ouch! 3) The timing position sensors (I think that's what they were) were replaced.
What Edmunds.com says (Accurate assessment for all Cadillacs in my opinion - advice: buy used and don't invest too much. A $15,000 car is a throw away - $50,000 lemon would be a problem for me.
If you're looking for a top-notch luxury sedan that favors comfort over performance, the Seville is one of the smoothest rides this side of Stuttgart. Pros World-class engineering, contemporary styling, smooth V8, superbly equipped. Cons History of not retaining value as well as rivals, electronic doodads could be costly to repair.
What's New for 2000
The Northstar V8s have been improved, and all models get a new airbag suppression system and the revised version of GM's StabiliTrak. A new ultrasonic rear parking assist feature and an advanced navigation system are optional on both STS and SLS. There are also two new exterior colors, Midnight Blue and Bronzemist.
Summary: They build excellent cars, but they have so many electronic monitoring and control systems that the reliability has to be much lower than a simple machine - mathematics tells you that. I always buy them 2 years old so there is warranty time for me to get all the bugs out. They depreciate rapidly the first two years so you can get good deals. The 1996 was $12,000 and the 2000 was $15,000. These were $40K - $50K cars new. I have a friend with a Toyota and he has problems too.