I have three pairs of these, they are by far a most killer value- (1 brown lense pair and 2 green).
They are not far off from $80-100 glasses in optical clarity and when I shine my UV lamp through them they seem to do the same as my Raybans and other 'designer' glasses. They don't distort light or give me a headache that I've seen with other sub $50 glasses. They can take a tumble as well and don't scratch too easily or have the lense pop out (the lenses are just a poly/plastic though).  I get compliments on them, and highly recommend them.
They are very very close to RayBan Erica, yet they seem to look good on men's face too.