This car is very fast. It's biggest drawback has been the 7 speed automatic; around town it always seems to be in the wrong gear (too low) and confused when you step on the throttle (major hesitation before downshift). Sport mode does not remedy the issue. However, after 2+ years of suffering, I believe Infiniti has finally corrected the problem with their latest software update. The car now downshifts more readily. It seems much "smarter" now. I drove the car for most of the last year in manual mode, which is absolutely phenomenal when coupled with sport mode. Repeat, the manual mode is excellent, not as good as having a third pedal, but still very satisfying. Lately I've been more than happy to drive the car in "D" mode coupled with the standard setting. I didn't feel safe doing that before, now I do.
This car is sexy, and it knows it! Elements of Jaguar and Aston Martin styling are visible.
The footwells are very narrow for a car of this size. This is a side-effect of it being RWD. The "dead" pedal seems to be in the wrong spot, at least for me; it's too far to the right. On the plus side the air conditioned seats are great. It is possible to drive around in 90 degree weather wearing shorts, with the windows down, and feel comfortable.
Fuel economy is abysmal around town. I guess that's the price you pay for going grocery shopping with over 300 HP. However, on the highway it's very possible to exceed the EPA mileage number.
Handling is good, for a car of this size. That being said, this car weighs over two tons and does not let you forget it. The car behaves well when cornering; I just don't find myself inspired to push/explore its limits. Definitely on the luxury side of sport.