I can honestly say as good as anything else I have. I'm still tweaking (don't ya love intonating a FR?), but the buzz-free action right now is about 3/64. I've got about .012 relief in it though.

I don't know if I'm lucky, or have an unto-now hidden skill, or building necks is just not that hard, but every one I've done has been fine in that regard. Nice and straight and level. Where I've gone wrong is making them too narrow to suit my taste, which is pretty hard to fix. :D