In my opinion, the Predator is well worth the money. Installing the Performance tune is easy. And that's saying something if I can do it. Not a mechanic here. To get the most out of the tune, go get it dynoed and have the Predator dialed in for max HP and TQ. I gained 13 HP and 12 TQ. But instead of adding timing to my Mach, I had -12% taken out at 4K-7K RPM's, and -6% taken out at 2K-4K RPM's. I don't know if it's a Mach thing or 4 valve thing or what. Everyone else is maxing their timing out. Mine got HP and TQ but in the opposite direction. Anything else you use with the Predator is icing on the cake. Disconnect traction control, speedo adjust for gears, A/F adjustment (Had this done during dyno) and a bunch of other stuff I can't remember off hand. To me, it was worth it. But that's just me. Take it to a Mustang Dyno to get the max out of your tune.