Ive got it in my S3 and Ive found it kicking in when Im trying to power out of roundabouts quickly, kinda undermines your driving efforts a little
However, in really crappy grip conditions Ive found that its been usefull for not throwing me into ditches. Its like ABS and all that, its usefull at times and clever but it can hamper you and you can also outsmart it anyway
Nice to have it there tho if you want it, and you can always turn it off