So far I've only had the car for a couple of weeks. I will write another review one year from now.
As far as things wrong with the car there isn't really anything to complain about given the performance, style and comfort for the price, but if I have to...
1. Very faint "whine" from the drivetrain somewhere from 1,800 RPM to 3,500 RPM. May be normal. Infiniti will diagnose the car next week. Most people wouldn't notice.
2. A tiny amount of clutch "chatter" after driving the car for a while. Most people wouldn't notice.
Coming from a true blue automotive aficionado, this car for the money is an outstanding blend of style, acceleration, handling, incredible braking and comfort.
Excellent engine. Lots of torque from 2,000 RPM yet is smooth right up to redline. Very quick car.
Great handling. Flat, stable, superb steering (very 330 like).
Very strong brakes. The Brembo six piston units are among the best I've ever used on a mainstream production vehicle.
Good interior. Much better than the G35 Sedan, but still has a few areas of improvement, mainly in the choice of materials used. The seats are very good in design and materials, great leather. The doors and dash are good with nice soft plastic. The centre console uses hard plastic, could be worse, but not great. Nothing major. You'll notice the radio volume and controls are a bit strange since the car was originally right hand drive, but I got used to it pretty quick. Overall good interior.
The dipstick is a pain to get out and put back in. Very smooth and powerful on the highway.
Considering all of this car's strong traits it's a great vehicle for somebody who likes to drive a bit harder and more aggressive than the average person. The average person will find this car very fast!