well so far i experienced exactly what supra described... i mainly bought it because it supposedly raises testosterone levels, i assumed that mine was a bit low since i had low sex drive / energy. well so far i can only confirm his statements which are: increased blood flow, harder cock, bigger loads. also it supposedly lets you gain muscle faster due to the higher testosterone levels, so far i noticed that but it can only be my imagination so it´s not objective. the benefits for my cock are clear as day tough.
best thing is i´m almost doing no kegeling anymore but the strengh of the PC muscle increases anyway, but i´m getting best results if i do them anyways. well about how it works: it´s basically a chemical reaction between copper and zinc which creates low voltages that stimulate your entire genitals, but you won´t notice it´s even there which is the best part. only thing i felt the first 10 days or so was a strange kind of fatigue in my balls, so i took it off after around 12-15 hours a day, now i wear it almost 24/7. so far i can only recommend it since i didn´t have any side effects or anything negative at all.