I like that the lenses are darker than the Oakley OEM lenses, but these are thinner so they don't fit very tightly into my frames.  I have to be careful with my sunglasses now to make sure that one of the lenses doesn't fall out when I am wearing them on top of my head when I walk in from outside.  If they fit better into the frames, I'd give them 5 stars.  But since they don't, only 2.  You get what you pay for, I guess.