Faults:

Bad ignition module circa 1988.

Headliner fell 1990.

A/C failed circa 1994.

Water pump failed 1996.

Alternator replaced 1999.

Left Rear window smashed by vandals 1995.

Replaced steering center link 1995.

A/C failed again 1998.

Headliner fell again 1999.

Ignition module replaced again 1999.

Driver door jammed shut 2001.

Side molding unglued 2002.

Transmission leaking 2005.

Handbrake cable seized 2008.

General Comments:

Large, stable, comfortable car, good for interstate roadtrips.

Gas mileage was usually ~19 mpg when commuting 50 miles each way, around town not much worse.

The A/C failing was the worst fault. I haven't yet learned to repair auto A/C.

Working on the car can be a nightmare, like any other car just about, each in their own way - particularly due to the A/C stuff being in the way. Even checking spark plugs can be difficult on the passenger side.

The car is larger than modern Cadillac 4 door sedans (not SUVs) - it really gets respect on the highway from other drivers that I don't experience in my smaller, newer cars.

The 307 V8 (Oldsmobile motor?) is still smooth running and responsive after 230,000 miles - no exhaust oil burning smoke is yet visible.

The transmission is smooth and shifts with 'authority' - but has begun to leak while driving.

Aside from electric windows/seats/A/C, the car is simple with respect to electronics - just a simple HEI module to control the ignition.

The Rochester Quadrajet carb is a well proven design, and not too difficult to 'rebuild' with a kit.

I'm keeping this car for sentimental reasons, it was my parents car. I really enjoy driving it and we just made a 600 mile round trip just for the heck of it.