I'll be getting new tires next year. The tire shop that I've used in the past (NTB) lifts the car by driving it over a lift that uses wide rubber pads that run the length of the sill plates below the doors. They lift the car about a foot off the ground. My question is: Is this a safe way to lift the car, or should I insist that they use a hand jack on the center jack point and do one side of the car at a time?