Interchangeable Lenses?

While I was checking out some Cupcakes and Cashmere posts, I saw Elizabeth and James Melrose glasses that have interchangeable lenses. I don't know whether I think they are cool or not. Maybe because I'm skeptical about the spectacles that cost $300. I mean, $300....the lenses purposely pop out.

They just look so cool.

You know what, the concept is awesome and they look cool. I need to stop and embrase the awesomeness.