I've got about a half dozen runs in on these bad boys... They fit like a glove, very nice. The only thing that I'm dissapointed in is the cushioning. I had hoped to wear these for my trail marathon in two weeks, but I think I'd be better off with a shoe that's a little more comfortable in the long run. These will work great in any trail conditions half marathon or under. Anything longer than that and I can see some issues with comfort... The grip in grass and dirt is tremendous, I'm really going to like these.