Next time, I will get the size up and trim to fit my shoes.  However, the insoles are life saving when I'm working outside in the yard.  I can stand for 100% longer than without the insoles.  I'm not sure that the copper is doing anything in particular, but I have no baseline reference.  Superfeet make great products; I highly recommend them.  Especially if you have plantar faciitis or other foot issues.