My 'tour has seen a few powershifts. Never balls-out clutch slamming at the redline, but serious rev mis-matches. It seemed to handle them, but that was on smaller tires that broke free in second and third when I powershifted. It is faster, that's for sure. You don't have the glass diff, so you should be OK with 3 slam-shifts. Like you said, it's worth the money.
