@wheels,
I can't call it a con, thats the roofline of the car. Unless you're Alam Channa's relative, the roof wont hit you. At 6 feet, when I'm in the rear seat it doesn't feel like an issue to me. Moreover I've had friends as tall as 6'5" in the car who have yet to complain 
If you look at the car overall, its cut low, thats just how the aerodynamics are. Sports cars usually have such roof-lines, and although the R18 version isn't a sports car, its good to have a sporty feeling anyway 