I also wonder how well it works with PRS guitars or LP Juniors where there's very little scope for intonation adjustment at the bridge - presumably it would throw the tuning further out?
Apologies if I'm being thick....
we tend to rely on the bridge as an intonation cure all.... and its not really a job its capable of. the result is usually no compensation at the nut and a slight overcompensation at the bridge.
so a compensated nut will usually change the compensation needed at the bridge - you should need less.
as long as the bridge is placed correctly on a LPJ it should still intonate reasonably well.
Not an issue on PRS as they have there own version of the compensated nut. obviously its PRS so they have played around with different versions but older PRS used to have the whole nut slightly closer to the first fret than the mathmatically correct nut placement. more recently they have done it slightly angled so its a sorter distance on the bass strings than the treble
...
as for material. Most materials sold as guitar nuts are absolutely fine. you used to see a lot of cheap guitar with soft plastic nuts, not so many really soft ones now.
my rule is always that if you drop it on a hard surface and it clangs/rings it will be ok. if it thuds it wont be
