Professional Reviews- “...the cabin materials, if not best in class (Audi), are on par with Mercedes and superior to Cadillac.” — Automobile
- “The M's chassis is a stretched, updated version of the G35's FM platform, which Infiniti says has 30 percent greater torsional rigidity and 1200 percent--yes, 1200 percent more front lateral rigidity than the old car.” — AutoWeek
- “This car has lots of style, but it's generic style.” — Automobile
- “The 280-hp V-6 offers gobs of go across the rev band and rarely leaves you thinking that you shoulda had a V-8.” — Automobile
- “Like its G35 sibling, there's some trailing-throttle oversteer to be had in tight turns, but just as in that car, the slide is easy to catch.” — Car and Driver
- “...the rear center seat is much less inviting, with a broad transmission tunnel consuming much of the floor space, forcing the middle passenger to splay his legs and have his feet share the front seatback cutouts with the outboard passengers.” — Car and Driver
- “The stiff superstructure, with wheels stretched to the corners and the engine behind the front wheels, adds up to a package more than capable of hitting the sweet spot in balance, ride and handling in a sport-luxury sedan.” — AutoWeek
- “[The Sports Package] sounds gimmicky, but it helps you to storm through decreasing-radius corners more smoothly.” — Automobile
- “It's a much roomier, more contemporary design that should be competitive with the Acura RL and Audi A6.” — Consumer Reports
- “On narrow, twisty stretches of road, hustling the M along at higher than customary rates seems easier than it should be, almost effortless.” — AutoWeek
- “[the M35/M45 is offered with] option packages that should satisfy the tech geeks and audiophiles alike.” — Car and Driver
- “The buttons [on the dash's control panel] are large, almost too large, but it makes things as easy to operate as any on the road right now.” — The Car Connection
- “As with the G35, the M35/M45's engineers have targeted the German competition, and the resulting car compares favorably with the BMW 5-series, the Mercedes-Benz E-class, and the Audi A6, not to mention the Cadillac STS, the Acura RL...” — Automobile
- “...we soon discovered that the adaptive transmission logic-when left in automatic-interprets your intentions accurately and performs so well in that mode that one soon forgoes the manumatic system in order to keep one's hands on the wheel.” — Car and Driver
- “Actually, on Napa Valley roads that twist up and down like a grapevine, even the base M35 delivers body control and steering feedback that are at least equal to those of the Audi and the Mercedes, which is to say quite good but a little soft, and the chassis is more tied to the task of hard driving than is that of the front-wheel-drive-biased Acura.” — Automobile
- “Though one or two drives aren't enough to draw more than a sketch, you will be empowered enough by the experience to be impressed.” — AutoWeek
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