I must confess I love my Schuberth C3 Pro. I know I have a Schuberth shaped head and have had a C2, C3, C3 Pro and now another C3 Pro. I do try on other helmets at replacement time but I've not yet found anything that fits as well, and offers a decent compromise of lightness, ease of use and build quality. I also like my C3 Pro as it's pretty quiet, a feature that often gets overlooked. As an aging motorcyclist with failing hearing as a direct result of wearing noisy helmets without ear protection, I think helmet noise (or lack of) is second only to fit when it comes to importance.
The sun visor is excellent and easy to use and my Scala G9X intercom is stuck to the side of the helmet yet does not interfere with the flip front or the sun visor mechanism.
One of the things I like about the Schuberth is that it doesn't "give" much. I've had helmets before that fit well when new but 6 months later, the padding has "relaxed" and the helmet is loose. My Schuberths have all still been snug fits after 3 years 50,000+ miles of use.