Hardly enough mileage to determine reliability IMO. Try 4 years and 100000kms as a minimum. Oh wait, you don't own them that long... And that makes you qualified to talk about reliability?
Anyone considering a FGC out of warranty needs to go see a psychiatrist first. Not because they are unreliable, just because they are expensive to maintain and fix. If you can't afford a new FGC, you definitely can't afford a used one.
With Cadillac, and GM in general, all you need to do is go to your local dealer that sells 1-year-old imports from the US. Check the wear on the interior (leather, plastic bits, steering wheel). Open and close all the doors. GM never left me "disappointed".
I used to do that for kicks and giggles at Myers in Kanata. Rattles in door panels and in the dash, pieces falling off the dash, worn leather - all of that speaks for itself.
After nearly 2 years driving the 3-series, I bet you couldn't tell it from new after a quick wash.