Was reluctant to buy, wondering what gains I'd receive. Glad I did. Improvement in performance was immediate. Accelerates faster with more power at the wheels. Feels like a different truck. Install was pretty straightforward although it took longer than stated in the instructions. The harness is bulky and presents a challenge to stuff neatly behind glove box. Overall very satisfied.
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.