What Cummins 24V chips/ tuners/ boxes/ you like or not?

Well.......this wasn't a Cummins, but I had a DiabloSport Predator on my 04 F250 6.0. I liked it. Free internet updates and the programmer is an OBDII scan tool. Three power levels. Fast, faster and hold the hell on. I didn't use the third setting because at the time they didn't have transmission support on that highest setting. But it actually increased both power and mileage. Alien technology I tell you. lol