While the 2014 Q50S Hybrid certainly puts up the numbers of a performance hybrid, it doesn't exactly drive like one. The brakes are one issue. Though they obviously stop the car well enough (our 60-0 mph braking test proves that), the Q50S Hybrid's brakes exhibited some of the worst pedal feel we've experienced since the first-gen Toyota Prius. The handoff from regenerative braking to mechanical braking is incredibly abrupt, with the brakes seemingly not slowing the Infiniti down in regenerative mode before quickly engaging in mechanical mode, throwing the car forward on its front wheels. Testing director and dynamics guru Kim Reynolds summed up the brake transition woes quite well: "Basically, their crazy initial bite renders the car unacceptable. I'd hate to be a passenger in this car in city traffic." As senior features editor Jonny Lieberman put it, "Performance hybrids require performance brakes."
And then there's the Infiniti's Direct Adaptive Steering -- steer-by-wire – which feels neither direct nor adaptive. We've already gone on record saying that Infiniti's steer-by-wire system makes the Q50 exceptionally capable at drifting, and that's still the case with the Q50S Hybrid. But while drifting is great and all, that's not how the Q50S Hybrid owner will spending most weekends – he or she is going to spend most of the time in the city or on a highway, with sporadic trips to favorite back roads. Cruising about town isn't where the problem lies, as the Infiniti hybrid feels rather smooth. "They've managed to dial out bumps in the road," said MT editor-in-chief Edward Loh. "[It] creates an odd sensation when you see bumps, feel/hear them hit the tires, and come up through the suspension." Steer-by-wire shows its limitations on back roads. "Weirdest feeling ever," said technical director Frank Markus. "It almost feels like I'm in a classroom simulator, and the instructor is constantly modifying my steering inputs." "Steering wheel feels like the column terminates in a jar of molasses," said Loh. Lieberman: "Steer-by-wire needs a serious rethink to be viable."