I'm not confident at all - in addition to the rattling sunroof, I had body panel misalignments that had to be fixed on the 2016 replacement car (where is the factory QC???) and a driver seat cushion defect. The quality is just not there - interior plastics are cheap and easily scratched/scuffed as well. In addition, too many small squeaks are groans from the dash on uneven pavement (in both vehicles and in loaners) for a car at this price point.
While they were nice looking cars with a good feature set, there is a reason they are priced significantly lower than Audi/BMW /Mercedes, etc., - they are not in the same league as those vehicles. Having now cross shopped those brands for my next vehicle, the difference is very obvious - from smaller things like the quality of the switchgear to the quality of the materials and, especially, the fit and finish and refinement of the ride and handling - the G80 is a lesser vehicle.
I also found that the Htrac system exhibits dangerous behaviour of killing the throttle if any bump is encountered on acceleration - it made exiting a parking lot with a small driveway lip and crossing the road very dangerous unless you disable traction control and ESC. This does not happen with the other vehicles I've since test driven.
So, good luck with your Genesis cars - you get what you pay for and I, for one, am no longer willing to live with the significant compromise they bring. The dealer experience is marginal at best and definitely second rate compared to the real luxury brands. After all the crap I've been through, I'd rather pay more and not deal with the "baggage".
As many of my friends/colleagues have said as they've seen my Genesis saga unfold: "What did you expect? You bought a Hyundai. It's an expensive Hyundai - but it is still a Hyundai!".