That the procedures are trained, tested, and current, not guessed. Both shops hold I-CAR Gold Class, the highest shop rating. Every technician is I-CAR Platinum, the highest individual rating. Each is also ASE certified, the deeper exam covering body, paint, estimating, and diagnostics. Liberty Hill’s Porsche certification sits on top, earned through factory testing. Short version: the people touching your car passed the hard tests, recently.