CINCO
Man, these were everywhere my freshman year in Alabama. I'd never seen them before that. I remember being mildly intrigued by them, but could never really understand if they'd actually stay on your feet. They gave off a "my bangs are almost in my eyes - the bottom of my cargo pants are torn a bit - this hooded sweatshirt is too tight to wear over my polo" vibe.
QUATRO

My parents became irrationally supportive of these... which resulted in a "washing the boat" and "I don't give a fuck what you think" explanation. I actually don't mind them as lawn care foot wear
TRES

Classic. Too many straps negates any sort of convenience you get in wearing sandals. Though, the idea of owning a pair of high quality handmade leather sandals is attractive.
DOS

Absolutely not. There's no aesthetic or functional reason to wear these.
UNO

There's too much to say about this phenomenon, which ironically stems out of the burgeoning philosophy that walking and running barefoot is actually better for you. (Who would have thought?) So what do people do? They design a shoe to address this theory!?!?