The thing's a total waste! There's only one reason guys would want to use it, and that's to see naked women. But the thing only works for light of a single wavelength, not for white light (which is a mix of all colors in the visible spectrum). That means you'd need to find someplace where all the lighting is of a single non-white color, like red. And the only places I know of where all the lights are red are strip clubs. You don't need an invisibility cloak to see naked women in a strip club! All you need is a handful of $1.00 bills.