"Where the old G63 was an absolute terror to drive quickly on winding roads, the new model is significantly more composed. Credit the fully independent front suspension and (especially) the new electromechanical steering setup, both of which are slightly massaged for AMG duty. Like the G550, the G63's steering is far more direct and responsive in its action, though still lacking in tactile feedback. Quick transitions will result in noticeable body roll, but it's nowhere near as topsy-turvy as the old G63. This brutish SUV is simply a lot easier to control, and the big, AMG-specific brakes can scrub off speed with a quickness should things start to get out of hand."
-- Steven Ewing, Roadshow by CNET