It was delivered quickly,had to update. After update it took 10 min's to program . I'm impressed with results. Not seeing mileage gain Yet, still playing with new H P. Trans shifts were greatly improved! A friend has a hemi, always dusted me for roll ons. Not now, asked what I did Told him, he is now purchaseing one for his truck Overall very happy. Product/ good Service/ good I have bought hypertec before and love the product First time user of auto anything, pain free!