The traction control has 4 point adjustment and launch control. The most agressive setting is Wet which doesnt allow any wheelspin really. In the wet I can just floor the accelerator and the computer calulates how much power should be put down. I have been behind Imprezas in the wet and once rolling it is quite amusing. The rest of the buttons allow for 5, 10 and 20 % wheelspin, that is a percentage of the wheels spinning freely. 10 or 15% is what I usually use in the dry. The launch button has two settings one dry one wet. This allows a secondry rev limit. For example I press launch and floor it, trhe revs lock at whatever I have set it to say 5000 rpm, and then i dump the clutch (or slip, well sometimes) and then the computer calcualtes how much power should be put down. Done. Tim O.