I've got one
I also had their previous one, the HJC AC-12 Vader, and now the current FS-15, Love the quality of the helmets, it is very comfortable compared to my Icon helmets, and fits my head much better. As far as weight goes, my girlfriends got a scorpion helmet a (small) and it weighs a great deal more than the carbon one
just look at the review here, this is what convinced me to get it :
http://www.webbikeworld.com/r2/motor...met/hjc/fs-15/
and, my one problem with the ac-12 was just the cheap plastic vents on the sides of the chin - which has been replaced with a steel mesh, which looks oh so much better