Road Racing - Zeronine carbon fiber helmets?

Getting ready to purchase a helmet in the near future and wondering if anyone has purchased any Zero 9 helmets. Can you tell me any pluses or minuses with these helmets. The pricing doesn't seem too bad. I'm looking at the Z9-MRR SA Snell 2010 onces it's available.

Being carbon fiber are they lighter than a traditional fiberglass helmet, or whatever material they are making them out of these days?

Thanks, did a search and found nothing.

Looks like a decent helmet and at a good price.

The couple things that stand out to me is the lack of any mention about being HANS friendly. If a helmet is designed around using a HANS device, they tout that. Second is the availability of replacement shields.

Your shield will get scratched.