I have a Roof Daytona Snot green, Just over 5 years old.
Noisy and mists the visor (Unlike the ride user reviews). Still on the original tinted visor, could not get a clear replacement for acceptable money. Top Front vent slider broken, and the lining has started to seporate just arround the visor opening.
Fits like a glove, althougt it is a helmet and goes on my head.
Had a Shark xfz?? before had it for 10 years, two visors both clear. Only bought the Roof because I wanted more space to wear a balaclava through the winter, and the Shark was noisy and misted up.
Before that mmmmm a yellow open face one of the first polycarbonate things cannot remember the name it came as a second hand package with a Honda SS50.

I can still see the mental picture of my Dad with the helmet on "Testing" the SS50 after we had bought it.
prior to that a wooly benny hat was all I wore as a pillion on my Brothers Triumph.
As for my son all MX helmets, he is on to an RST 3rd Peak (1 year and still using), Outgrew the O'neil 2 peaks this one fits me so have kept it (1 year), Could not get new peaks for the Lazer after 4 replacements (2 years).

bless him.
Just received an e-bulliten on Helmet testing thought I would add link for the forum.
http://www.iam.org.uk/iammembers/Mot...ET+RATINGS.htm