I've been running in my Five Fingers since June. Every other day, on an almost perfectly flat trail (because hills hurt my hip). No timer, no racing, no training. Just easy, steady running. And it's been great. I'm almost perfectly comfortable with the form, now. I no longer have to pay close attention to every stride - just little adjustments every once in a while is enough to maintain the proper form. So that's awesome.
If you're a runner looking for a change of pace, I recommend these.
But, the weather's turned c-c-c-cold these past couple of weeks, and it's taught me something new about the shoes: the 3mm of rubber in the sole provides no thermal insulation, and the mesh that makes up the rest of them does nothing to keep off the cold. First step and I can instantly feel exactly how cold the road is. I sweat from the top of my Bruins hat, through my three shirts, gloves and down to the bottom of my nylon pants. But my toes and forefeet go nearly numb from the cold.
Five Fingers: for an ascetic athleticism.