I've had to have the heater/AC controls fixed when I first bought it, but those were minor problems.
I had to replace the clutch, radiator, and a rear brake system.
The bottom half of both the doors started to show some rust, but very little. I had the doors repainted to fix that problem. I also added a wing to the rear to give it a custom look.
I only paid 2 grand for it, and I put exactly that amount back into it for repairs.
Overall though, this car is excellent. It has proven itself to be very reliable. It is one of the best cars I've ever owned.
I have a 1994 Cavalier R/S. It is a blast to drive. Nothing better than a stick shift in a small car like this. Small and plenty of power. Very fun to drive.