One thing to consider with POC helmets is the non-adjustable strap splitter/divider/keeper. If you have a taller head or ears that sit lower on your head you might run into issues with it touching your ear lobes or running really tight to the bottom of your ears. That was my experience with the Omne Air Spin. Fantasic helmet otherwise @ $150.
IMO this is an unacceptable design-flaw.