Easy to use, but probably not worth $300 for my Truck.
4.7L Auto, CAI & HF Muf. Wanted more power (&/or) MPG & adjust speedo for big tires. I can't give it 5*'s because I can't honestly say it was worth 300 bucks. There are other options that do these things for less. If you have a newer truck, you can probably get more bang for your buck using more than 4 tunes. I noticed power gain in 91 performance, but only got 14mpg. Enough to notice driving, but gas is $.50 more. Gain of 1mpg (16 to 17) in Fuel Saver Mode on 87. Not much savings there either.
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.