I received the F5 quickly. I read the directions and plugged it in my truck. It is very simple to use and I tuned the truck quickly. Now driving it is different. It is peppier and my fuel average went from 11mpg to 16mpg. It's a Dodge Dakota with the big v8. I will set it to towing when I pull my trailer and I'm thinking it will have better power on the hills and better mpg too. I would recommend this product to anyone.
I'm saving so much gas and way more power
I had installed my headers and intake about a year ago and went from 17-15 mpg to 15-13 mpg but had good power. Now power is amazing pulls hard, only thing is the price I feel like Unichip should have dropped the price on these but auto anything was the best deal and fast shipping and great costumer service, they emailed me right back with any shipping problems.