I had the chance to test drive the NC shift knob earlier today. My throws are more confident, less effort and most noticeably...the downshifts from 5th to 4rth and from 3rd to 2nd, are more assuring (the stock knob seems "unsure" in feel when I engine brake, esp from sliding the shifter from 5th to 4rth notch...a feeling somewhat that it might go to 2nd). Essentially, throws overall are way smoother. Also, this solid aluminum/leather NC shift knob is more elegant and sportier in looks and feel in your hand (the buttery smooth semi-matte black leather blends very well to the leather steering wheel, etc and does not look "out of place" vs other shift knobs). It is also as I estimate, substantially 4-5X heavier than the cheaply light, hollow bodied, plastic stock shift knob.
Quality well Made in Japan (for $95, shipped to my door)..somewhat pricey for a shift knob, but well worth it. I am quite happy with this OEM mod.