Just got mine for 25 miles and loving every second of it. Usually folks that have problems are a bad AP and DIY. If you read the manual step by step you will be fine, go to cobbtuning website and read the manual if you haven't received/purchased your AP yet. This way you will have the whole install in your head but still go step by step with the manual when you are installing the AP. When the AP is in the process of installing DO NOT touch any of the AP wiring/controller or turning things on or off in the car. Don't even close the car doors (the connection from AP to car might come loss). Just let it download for about 5-10 minutes. READ READ READ the manual when DIY.