I agree with the review that described a love-hate relationship with Solar Shield sunglasses.  I absolutely love the light blocking ability of the glasses and the fact that they do not block peripheral vision.  The smoke color and amber color are both great for different driving conditions, and they are easy to get on and off while driving.

But they do break.  Like the other reviewer said, it is always on the same spot on the side.  I have never lost a pair of them, and they don't scratch very easily.  But I have never had a pair last over a year without breaking.