I've got a newer chassis (number 2932) and in the 4 months it's been on the road, I have had a few teething problems that probably would have been taken care of if I had taken it back to my engine installer after 500 miles or so. Nothing major to complain about. Wheels imbalanced,
oil temp gauge line kinked and stopped working, thermostat and intake manifold gasket replaced under warranty from Roush. Everything else seems tight and of good quality.
If I could have found a used one exactly like mine, I would have bought it in a heartbeat. This is my second Cobra and the first year is always filled with teething and diaper changes till you get it set up just the way you like it. But it is well worth the effort!