I orginally had the edge and it was ok. I upgraded to the Gryphon and had two custom tunes done and all I can say is wow. Even in my 2003 it is night and day from the stock canned tunes. Bill and the gang at PHP did an awesome job. Thankyou so much. The truck drives better than ever, throttle response is good and shifts perfect. My mileage is even upto 15 mpg, an increase of about 1.5-2 mpg. So anyone on the fence about this, have no worries, this is a wonderful product. Well worth the money and time to wait for it. Thanks again I couln't be happier
