I've been driving a lot for work. Got mine about a year and a half ago with 79k, I just hit 123k the other day. I've kept up with everything this car needs, anytime something's needed done, I've done it. I love the car, to me I don't like the new ones, and these are the last of the "real cadillacs". This thing has everything but the wood on the wheel, sunroof, and the magnetic ride-which I'm cool with. Was nice on the seville but sounds expensive to fix if you have to and rough on our roads, really wanted a sunroof- but really one less thing to screw you around. Got the rear climate control, ac seats,etc...
As everyone else has said, maintenance, keep up with stuff- don't just let a bunch of stuff go until the car becomes a pos and enjoy it. You could get a newer one with less miles and it could give you more problems than the one you have. I'd like to go for the northstar high mileage record, and get a fun summer car. On the fence between that, taking a bath on this car over the odometer even though it's so clean and getting a suv to get back into a boat, or neither and just try to save some money but not happening right now anyway