I had mine done at my 10K service. To me, it doesn't seem a huge difference. Except, as John_H noted, the squatting thing is practically gone now. The shifting may be smoother too, but that improvement is not dramatic. I almost always drive paddles, so being able to activate them without throwing the shifter over isn't a big deal for me either. For the most part, I hardly notice the change. But, it's free. One caution, it is apparently not reversible.