Well I am going against the overall theme here, but I truly believe it does work and I don't hunt with out it. My first 3 years of bowhunting, this is no lie, I got winded on a regular basis. My cousin can attest to this as one night we were sitting in trees on opposite sides of the field. When the night started the wind was great, but in PA the wind will often change directions as it did this night. I had a doe wind me from almost 100 yards away. My cousin said he has never seen anything like it. During those three years, if the wind was wrong, without fail I would get winded.
That was it for me, I purchased a scent lok suit, actually the Savanah series with base layers. In the last two years I have not been winded one time! Not once since I started wearing scent lok have I been winded. I have shot my last two bucks from directly down wind and have had many deer come in. I don't mean to sound like a commercial, but I know it works for me. I think I may be stinkier than most.