Anyone using an X Cal tuner?

[Foster98GT]

I only know what i read on AmericanMuscle.com and was wondering does anyone on here use it? and what gains you have seen?
Also whats meant by getting a Tune?

 

[Matt94GT]

In your position, as I rememer you just have some minor boltons? A tune or even custom chip/tuner isnt worth it im my opinion. A tune for you would consist in playing with timing and fuel pressure, with a tuner those two plus playing with spark tables, voltage levels, and a buch of other things which are more benifical to a car with HCI and even more so a car with a supercharger/turbo.