I actually love the looks of the production G6. That concept is kind of like a cartoonish, smoothed out version of the real thing! :) It looks cool too.
I recently rented a 2006 G6, and I was pleasantly surprised. I had been thinking about buying a Mazda 3s, but given that the Pontiac's 3.5 liter V-6 was giving me better gas mileage than the 2.3 liter Mazda 3 would, well...what's the point in buying an economy car when a midsize V-6 gets the same or better mileage?!
However, I wish GM offered a 5 or 6 speed automatic on the car. Also, I have nothing against pushrod engines if they can match the power and refinement of the newer designs, but these old GM engines are falling short compared to the offerings from Honda, Toyota, Nissan, and others. I mean, if a Nissan Altima's 3.5 liter can put out 250 hp and still deliver 28 mpg highway, then the 201 hp from the G6's 3.5 liter seems a little low. I'd consider the 240 hp G6 GTP, but I'd like to see it get slightly better gas mileage than it does.
So, because of the 4 speed transmission and the old pushrod engine with its modest output, I'm not quite sold on the car. Also, I wish you could get stability control without having to move up to the GTP model.
If GM ever puts a modern OHC engine in this car, mated to the upcoming 6 speed automatic transmission, then they'll definitely have a contender!