I have one of these beauties, made in NZ:
www.campbellaeroclassics.com/
Truly it is a work of art, as advertised on their website. The avionics work well, at least in the helmet that I own.
If I have any complaints, it is only that it is too hot for the summer; but I suspect that that would apply to most helmets.
I freely concede that these helmets are silly to wear in a spam can, but there's a bit of Walter Mitty in most of us!