So far I really like em! When I run, it feels like it promotes a ball of foot strike over a heel strike. There's some padding so it feels real good running on concrete (but if ur looking for a true barefoot xp like vibrams u might not like the padding).
There is real good ventilation. Before I ran my feet were cold because of this, but as I started running my feet were kept cool and not sweaty at the end!
My arches started hurting after mile 3, but not enough to make me stop, just some discomfort. I read this is normal starting off, I just need to get used to running on the balls more.

I work at a museum where I stand for long periods of time, so I bought a 2nd pair just for that.