PowerFC fan boy, used it, tuned several, got rid of it. Even got rid of a D-Jetro out of a track 180SX I'm building and tuning.
Sold that dinosaur egg for the price of an Adaptronic ECU which has flex support, engine protection, wideband feedback, traction control, anti lag ra ra ra.
Don't see the PowerFC doing that.
And for the record Nistune > PowerFC.. I have a soft spot for Nistune. Basic, yet elegant not to mention flex support out of the box too.. don't see powerfc with that.
Hey if you already have a powerfc use it, but if you're on the market for something you must be totally daft to buy one.