I can't judge the twin's traction and stability programs since I haven't really tested them, but I will say both are pretty damn bad on my Si. They make the car unpredictable and in some conditions actually cause a loss of control that otherwise wouldn't have occurred with these programs turned off which I've tested a decent amount on closed courses.
I like having it as an option, mostly to assist in climbing slippery surfaces but other than that it is off. Fortunately tapping it once will toggle the system, unlike these new cars where you have to hold the damn button down
.