Bought these to dress up as MacReady, Kurt Russel's character from The Thing, for a Halloween party. They totally fit the bill and made me look awesome.
I've worn them since... just grabbing them when I can't find my regular sun spec's.. and they're actually somewhat practical. The lenses actually block UV light, and they're not just tinted plastic like most cheap shades. All in all, I think they're worth buying if you're cool enough to be considering them.