The shift points are very smooth and when it shifts, the truck just wants to go go go. Jody at DP did a great job setting up the tunes and shift points. The chip made a night and day difference and my truck drives like a totally different truck. I purchased the 60 tow - 80 Daily and 100 HP performance tunes. I have a 2000 F350 with a 7.3 and a DP-Tuner. So long story short, just because it's 'open source,' doesn't mean you'll be able to put other tunes on it. I have yet to call other tuners to ask, but am planning to. They just tell you they won't tune on it. I have an idea why they won't do it, but they won't say. I talked to a non-DP tuner (won't say who), and they basically told me they won't tune on it. The 0 position is hard to figure out how to get it out if you're not aware how it works (good for anti-theft). I was thinking of getting a Hydra, but the no-start feature is just another position, and frankly I'm not crazy about that. I was thinking of buying a F6 now that it's open source so I could use two different tuners on it and try that route. I tried a TS chip recently (not gonna get into the 'who's tunes?' discussion), but really did not like the rotary switch I suppose because I was used to the DP controller. Now that I have done some performance upgrades, I've gotten tired of pulling my chip out and sending it back. I have had a DP F5 for about 4 years and have come to like the usability of the controller, especially the 0 position no start feature.

Dp tuner for 7.3 powerstroke