I've got TunerPro and bought the Burn1 unit from Moates (
www.moates.net) with a few spare chips. It's worked well so far, but I've only burned 3 chips since I bought the stuff. The ones I burned were just to compensate for the different injectors, change the fan turn on/off temps, and enable the rev limiter. I need to learn more about tuning in general before I go futzing around with the program (like modifying timing/fuel/MAF tables).