Yes, my Edge EZ let me down. My 03 SO, w/auto tranny, had a slight fault. With my Edge set on 3rd level, my engine light came on and threw a P O 193 code. Dealer said High fuel pressure. Contacted Edge, and my new Edge is on it's way. I sent them a picture of the inside of the unit. It had gotten hot for some reason. No matter, they made it right no questions ask. I do like my Edge Ez. Went on a trip with out it. 19 hand figured MPG, at 70 MPH w/air on. Should have been at least 23 w/chip. The chip will give better fuel mileage. Getting ready to haul "A" to Az. Dutchmen Classic High Top, 5 er, 27ft w/slide. Second owner. Is in like new condition. Wagons "HO" GO WEST YOUNG, MAN< GO WEST>

 

I used to run an EZ on my SO but although the overhead said mileage was much better, it was actually down. Good for you if you are actually seeing a gain. I didn't really care because the extra power was so nice....