Product works as described. However the install instructions are very confusing. The instructions that came with the device said to use the USB stick to down load the GT load data but the down load program would not find the USB device. I had to use the GT device to down load directly into it. The layout of the on line instructions are confusing because they mix Gm, Dodge, Ford and others together in the instruction layout.
Not worth the Money
The instructions don't tell you to, but when I called Bullydog with a pre-installation question, they told me that I need a battery charger or jumper cables hooked to another running vehicle to install because of the high risk of battery voltage fluctuation. It took an hour to install and I haven't seen any improvement to my truck; no noticed horsepower increase (haven't dyno tested it) and no fuel mpg increase.