Has anybody here used it? There's a few things I'd like to know from real customers rather than website disclaimers and such. The website says it's worn throughout the day. Is it discrete enough to wear while doing manual labor? I'm a blue collar guy. What's the risk factor on this product? How effective is it, and what are the chances of it doing nothing at all? Is it really worth the $300 they charge for it? Does it help both length and girth or just length?