I took a very basic gentle fall and rolled to my head turn out I got a concussion never that a fall like that while wearing a helmet would end like that. Has anyone else experience concussions associated with skiing?
No helmet in the world is going to save you from a concussion. A helmet will help to soften the impact of your skull but there isn't a single helmet that is "bulletproof".
Your best bet is a full face though, save the rest of your face from some serious damage. Always wear a helmet, its not going to make you invincible but it'll help protect your precious skull full of fat and protein.