I've only run this file for 150 miles or so but it is a big improvement over the v3.0 warhammer tune. The shift points are way better even if the shifts are a bit firmer. The truck feels like it has more power.
I've tried both v3 warhammer tunes and find my truck feels slower than the old version. My buddy has a stock 6.7 and his truck seems just as fast as mine. I run stock tires so i don't care for the higher shift points but I am getting used to them. I would probably go back to the old warhammer...