I took your poll and answered "Yes, I use carbon clothing and notice a difference". I know this is a controvercial topic and some would disagree, but...
I am one of those guys who, after some research, tries many hunting gadgets (within reason) if I think it will help me. Many have worked and Ive stuck with them and many havent...they've been eliminated. Scentlok clothes was one of those things that I was toying with trying for years. I finally bought some "base layers" and a hat about 3-4 years ago. I always played the wind, sprayed down and was scent concious prior to my purchase. However, I do honestly feel it helps. My personal observations and experience tell me that a once (prior to scentlok) downwind encounter with a deer that resulted in a tail in the air and them running for cover, is now, maybe, a deer on alert that "caught my wind" but maybe not a whiff big enough to spook them totally. I have also had my share of deer downwind that I thought would catch my scent and there was no reaction from them.
My best recollection of this was 3 years ago. Wind direction changed and a mature doe walked about 60 yards from my stand and I know the wind was blowing in her direction. She kept walking, calmly, never scent checked the air and never caught my wind. About 20 minutes later, a coyote was hot on her trail...he picked me up, without a doubt, bee-lined it back the way he came without missing a beat. Is a coyote's nose better than a deer's...I dont know. I wasnt hunting coyotes that day, but I was convinced it passed the deer's nose test.
I know you cant "forget the wind and just hunt" alltogether...and that it doesnt eliminate scent entirely, but I feel it does diminish scent, more often enough to a degree not to spook deer, as opposed to not wearing it and having them be totally spooked.