I didn't see it mentioned, but the Diablosport Predator, or now the Trinity that has replaced the Predator, worked great as well. I did a slight improvement in fuel economy on the highway only, when using the fuel economy tune. Throttle response was much improved because of the adjustability of the electronic throttle parameter. Never really noticed a power increase. Even if they claim 20hp, 20hp in a 6500lb underpowered JK would be hard to notice as an improvement IMHO. With that said, it was worth the price I paid.