If you like the idea of zero frets (or that nut, doing essentially the same thing), give the LSR roller nut a look. Same sound, better tuning stability, though it is limited in width and radius. You can get brass nuts which also give a similar tone (any metal is a similarly significant change from bone, TUSQ, or any graphite compound) in a wider range of widths and suitable for any radius.
Metal nuts, roller nuts, and zero frets are really nice, and I wish they'd get adopted more widely; they're easy to work with, they even out the tone, and there's nothing smoother for tuning stability than polished metal.