I made the modes on my 6.4L (2008 F250) and it was like getting a REAL truck for the small investment. My DPF failed and the cost of replacing it made the modes worthwhile for me. The only downside from my perspective was that I waited too long and missed out on the pleasure of driving a truck that had the power trucks were intended to have. I bought the SCT tuner, a EGV delete kit and a new exhaust system from Sinister Diesel. They walked me through the entire process and I did it myself. Not a bad project for a great-grandmother!