since I'm in the market for a controller, I took at look the the Pro Flo. I have been using a FASTT XFI system for many years, not on a Gen 3 though. Comparing that Pro Flo to the Terminator Maxx is like comparing a very specific dish to an all you can eat buffet. It appears that each Pro Flo is specific to one engine. The Holley is not. Plus the Holley can control electronically controlled transmissions. Minuses for the Pro Flo: I don't see any mention of boost control. It only supports drive by wire. It's not really tunable, only self tune with some minor adjustments. For a totally stock engine it might be ok, but its expensive for not being versatile.