My Gli is like a month old so far there is no known issue with it but I would like to share my experience regarding its ride;
Seats indeed are uncomfortable as someone mentioned these are more like kitchen stool.
Road grip I did not get much time to check on that as most of the time I drove it within city until today when I took a test run at 140 on airport road and I was scared like anything as I felt the car is swaying.( tires are GT)
Air conditioning is fairly good.
mileage is reasonably good as I do not feel the need of getting CNG.
I did not feel this car underpowered except it is hard to make the tires screech.
overall it is a good car at least head turner.