This is a great product, it does exactly what it's supposed to do, at a reasonable price, with an easy interface. But I think people need to understand that this isn't a box of answers. It's a diagnostic tool. I was a professional automotive technician, I grew up working on cars, and I received a formal education in automotive technologies. The OBDII system is pretty complex, and can point you in the wrong direction. This is in no way the end-all be-all car diagnostic machine, but it's pretty dang useful to have in the tool box. For the price I paid I got exactly what I was looking for.