A guy I met at Road Atlanta a few weeks ago had that helmet. The LIGHTEST helmet I've ever held, probalby 1/3 the weight of my Shoei.
I never thought my next helmet would be an HJC, but it's damn sure leaning that way. The owner said it makes a huge difference at speed (it was his first time at RA and he was running 1:34's his second session, so I believe him
) and his neck isn't nearly as strained at the end of the day.