I ordered one of their performance chips for each of our 3 cars. They called and said if we wanted to get better gas mileage for our vehicles we had to order another chip for each which made it cost twice as much to get the mileage stated on the website. I asked them to cancel my order because of false advertising. They told me they had already shipped them. When I returned them they charged me $25 each for restocking a restocking fee plus $7.50 shipping fee for each. I was charged $75 in restocking fees! They are VERY VERY dishonest!