This was the first pair of Vibram FiveFingers I picked up.  I've been running around in them for a year and been a little hard on them.  Things I've noted about the shoes include excellent grip on smooth surfaces, good comfort, and the ability to go almost anywhere.  Disadvantages include you feel the cold in them in snow and ice, they're not the best sandy surface shoe, and the seams are ripping a little as I've been using them in more rugged terrain.  The grip in these is unbelievable, friends refer to them as by gekko shoes because of my ability to climb up rocky surfaces (they're not a substitute for rock climbing shoes but they're very good for going up  rocky surfaces that doesn't require rock climbing gear).  Love them.