Extremely light and comfortable, the only downside is there appears to be far more coverage at the bottom of the lens and it leaves quite a bit more light in at the top than I'm used to.

I love the Kato-like nose shape though it doesnt seem to work as well in Ruby, due to the angle it bounces light off the lens it looks permanently yellow which looks like that part of the lens is discoloured, the effect works better with the Sapphire lens though.