The G Sedan's cabin has a feel that's more like that of a high-end sports car than a luxury sedan; it's sporty and premium but not at all lavish. But fit and finish are top-notch and trims have been upgraded in recent years. Overall, the G Sedan rides more like a sport coupe as well; while it's not downright jarring, a lot of road noise makes it inside. Additionally, the G37's engine is significantly more coarse—both vocally, and in terms of vibration—than other rival engines.
While the G Sedan has the looks and segment-leading athleticism, the weak link of the G Sedan's package might be seating, cabin space, and general refinement and ride comfort. The front seats of the G 37 Sedan are nicely contoured, but they can be a bit too narrow or snug for some. There's adequate legroom, though headroom is somewhat scarce. The backseat is hardly a place for adults to spend long periods of time—made worse by a shortage of legroom and oddly reclined seatbacks. In back, the seatbacks don't fold forward as they do in many sport sedans, but there's a pass-through for skis and such, and trunk space is decent.