Replaced the nylon nut on a 335 with this.
There's a noticeable imrpovement with TUSQ both in tuning stability and sound.
It fits perfect, but this is a job better left to a professional.
The guitar tunes up without that annoying "ping" sound when strings stick on the nut. Also better attack, sustain and fretted notes match the open strings much better. And yes, I believe it is a better choice than bone. Unless vintage correct is what you go for.
I see no reason using anything else anymore in my work.
Recommended!