I have been using your product in my 2004 Chevrolet Impala LS for a few months now and is fantastic! I bought my “racechips” directly off your homepage and there is no place to leave a review, feel free to post my review if you like. The shipping was great, product shipped within 24 hours, great service. Once the chip was plugged in I noticed improvement after about 50 km gradually increasing until your stated 200 km. The best part is that the unit recognized and greatly enhanced modifications that where made after plugging in the unit. This product is terrific and works exactly as advertised. I have recommended it to all my friends and I have ordered a second unit for my wife’s 2014 Dodge Journey. Thanks for a great product!