I've noticed these sandals/flipflops in the summer of 2006. A lot of people have been wearing them, and at first i hated them. This year, i was with my parents at Whole Foods Market, and they had them there (weird i know, shoes at Whole Foods). I tried one on, and realized why people wore them. It does look like some Kingdom Hearts shoe or rather more of a Mickey Mouse feet look to it, but if you actually try that thing on, its super comfortable, and it sticks to your body. The base of the foot is great, almost like a New Balance or Saucony shoe, but super light.
It something worth having and worth wearing, too bad that its such a trend wearing this. I even see it on Japanese street fashion magazines.