I've worn HJC's for years, street and racing. A couple years ago, I bought one of the new modular style, easier to use with sunglasses and I only ride on the street now (which is probably more dangerous than racing). AHRMA wouldn't allow the modular style for racing. My old helmet had aged out, 10+ years old.
The HJC's fit me well, but they are probably noisier (wind noise, buffeting) than some other brands.
I only wrecked in one once, woke up in the ambulance several minutes later. Stepping off a moving motorcycle at 30 MPH is not recommended. You can't run fast enough to stay upright! Didn't have a concussion, only a broken collarbone.