Just got mine with the ECO tune. So far so good. The engine starts much quicker then it ever has, sounds more powerful even at idle. I notice it does not smoke up the garage like it used to. The EVIC is reporting 3 more MPG, and I only drove it around locally, all the while punching the accelerator

I can feel it is much more responsive and more powerful. I have never got so much gratification out of spending $550 dollars, and I got so much more power and torque, with out even getting my hands dirty. Another thing I notice is the response is instant when you press the accelerator at a cruising speed, no lag or hesitation, sort of like speeding up an electric motor with a potentiometer. The GDE is sweet