Just installed Zaptor Gold Acoustic III bought from junhe, good seller. Immediate can feel better torque and response from my suzie swift (8 months old) after 5 mins drive. Car idling more stable as it claimed and the aircond much cooler. Fuel consumption still dunno yet and i'm not into ICE so nothing much i can comment about that. Previously installed grounding doesnt feel anything, but combine my grounding with this VS definately i can feel my car much more lighter. Very satisfy for the money i invested for this gadget. cheers