I got a scentlock hat and coat on sale at Cabelas a few years ago. I almost didn't care about the scent blocking aspects of it, but it was marked down to where it was about the same price as similar items, and I figured that if it was quality stuff, why not get it and if it blocked my scent as well, so much the better.
The first thing that struck me when wearing the jacket was that it was a lot heavier than a non-scentlock jacket providing the same insulation. So if the scentlock stuff is worthless, all I'm doing is carrying around a bunch of dead weight.