I must admit that I am anal about scent - use the Scent Lok and other gear. Apart from wahing in scent free soap, I always wash down from head to toe with the scent eliminating cloths outside, especially my hair.
Having said that I always make sure to stay down wind of where I expect the deer to come out. Two stories from last year. I was in a ground stand, stump of a tree when a large buck stepped out not 20 yards from where I was. The wind was blowing right towards him, but he did not smell a thing - unfortunately for me he walked a the only trail that I had not cut a shooting lane. He was visable for at least a minute but never got wind of me.
The next day I walked along side a doe bedding area, into the wind - I had just reached a clearing when out of the corner of my eye, a 6 pointer came out , nose in the air, focused entirely on the does. I was able to draw my bow, could not really aim and shot him from 4 feet away.
My take is that the carbon activated clothing and scent eliminating products work if used correctly.