I recently bought a C3 from Revzilla. Took almost 3 weeks to arrive. Good thing I wasn't in a hurry.
I think it is a great helmet, but I had trouble with the fit. The center pad of the liner was leaving a huge red dent at the top of my forehead. I didn't have any such problem with my C2. After 5 or 6 rides, with no improvement during "break-in", I removed the liner, and using some small manicure scissors, trimmed away
some of the foam padding from the rear side of the liner, to thin it out where the center strip meets my forehead. Hopefully, this will solve my issue. I guess my head shape was not like their new Fritzs'.
It's quiet, well ventilated, has a great sun shield, good view port, and is pretty light. I believe Schuberth makes the best helmets, hands down. You get what you pay for.