Geno,
Not running the Predator however have looked into it closely. A few good things about the Pred would be the diagnositcs, operable after factory reflash, custom internet tunes and price. A few bad things would be vin lock ( 75.00 unlock). The most recent version is R1.11 and comes with 5 tunes, speedo,tire size and diagnostics only, 40,60,80 and 120 HP.
Feature wise it seems like a good deal, however without trying it and comparing it there is no way for me to tell whether it puts power to the ground any different or better than the others?