I haven't put a lot of miles on these shoes yet but my initial impression is great! I was in love with the Keen A86 and ran through them last year. Having enjoyed Merrell for my hiking boots I thought I would try this. They are spot on for size. I am a 8.5 and it fit perfectly. It has a wide toe box so you are not cramped running down hill. It has a bit more cushion than I usually go for but over all it is a really comfortable shoe. The lugs provide great grip on the trail. My only complain about the A86 was that the sole constantly slipped out on my longer runs. I have yet to have this problem in the Merrells!