I'm not much of a fan of electric power steering. My mom's 05 Malibu has it, when her alternator was going out (didn't know what caused this right at first, it was under warranty so the dealer checked it out). They kept beating their head against the wall on it, so I looked into it. The voltage regulator would "stick" so increase in RPM meant increase in voltage, up to 18 volts. When this happened the power steering would attempt to center itself...it's not a whole lot of fun trying to drive on a curve when it decided to center itself. While I admit, alternator failure in this manner is not common, the centering issue wouldn't have happened if the car had hydraulic power steering.