I don't run -- just wear these as shoes -- but so far these are a great experience. The feel is less structured than most shoes (even NB shoes, which are lighter than most). The sole is much less stiff, so your feet are liable to be a little sore for a while until the foot muscles build up, but if you like a light shoe that lets you feel the ground, this is a good choice. Though the sole is thin, it does afford more protection against rocks & sharp edges than, say, simple flats or "Mao slippers". It's a good compromise between a moccasin & a shoe, I'd say.

Also, the fit is snug but it doesn't seem to be rubbing -- so I think it's possible that these would allow for a more snug fit than you'd normally get away with. Obviously pay attention to whether it chafes - but don't just assume that it will based on the initial fit, give it a bit of time/distance first.