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.
If only it worked...
It's very simple and easy to setup and use.If you have the 4.7 Liter like mine, there are only 4 tunes available with this unit. 87 Octane, 91 Octane, Gas Saver, and Towing. Unfortunately the only tune that actually works is the 87 Octane. I receive an error stating the Program has a problem and to contact a number. Pretty disappointing. I have since returned to stock tune as the 87 Octane tune stretches the shift points out a little too far for my liking.