So, this is the 4th or 5th time I've rented a Pontiac G6. This one was the "GT" version with the 3.5 V6, which is an extremely smooth, quiet engine, but it would do so much better in a RWD platform. There is so much torque steer all the time, even when just doing roll-on accel or downshifting. It's so irritating that I'd rather have the 4-cylinder model. Also the transmission only has 4 gears, which is weaksauce considering that a base Jetta has 6. As far as the suspension goes, it handles good around town, but once you get up to highway speeds it's too soft & floaty.
I don't know if there is a sport suspension available for this car, but it needs it. The 4-cyl model I rented a few months ago seemed to handle better. Also, on the highway the steering is too fast and so when it's windy you're constantly correcting it. The shocks and springs are weird because on the highway they produce a glass-smooth ride, but off the highway the ride becomes brittle. Even if you slow down to 2 mph over potholes & railroad tracks, you get this wooden clodding sound, which I've experienced in several different GM FWD sedans. It's a hollow sound that makes you think something must be loose in the suspension.