These are super solid, grippy, great fitting shoes. I haven't been able to trail run with them yet as it has been snowy, but for running along the side of the road, they do extremely well. They fit like a glove, if you have a Sprotiva shaped foot. They are good for narrow(ish) feet. They fit true to size. I wear a 6, and I bought a 37. Perfevt fit. No breaking in needed either. Put them on and ran out the door.