I bought it brand new with less than 10 miles on it. Now it has 123,000 miles and still drives great. I have replaced the tires twice and replaced the water pump which the dealer misdiagnosed the first time I went in with it but no engine damage at all. I definitely would buy another car since it has never failed to start on me. I use regular oil and change it every 7500 miles or so and right now only have an issue with the rear window defrost is very slow if working at all.
ONSTAR the seats are very very comfy and I go on long road trips and have driven many cars and nothing is as comfortable as this car.
Make the power seat more secure the cable that drives the seat likes to come unlatched.