Although they took their time breaking in, once I had 50 or so miles in them, they were (and are) great. I buy 6-8 pairs of running shoes/year replacing road and trail shoes either after 4 months or 400 miles: after over a year of running, the Velocity Trail Runners are still in my regular rotation! I've run in almost everything and these are my default, go-to shoes when I'm heading to the rougher trails. As mentioned, I noticed a longer break-in period than with other shoes, but these things are made to protect your feet: uneven, sharp, pointy, jagged off-camber, rocky, muddy, rooty trails are not a problem with these. I wouldn't wear them for a 5k footrace, but they're not made for that: these are Sherman tanks, not nitrous burning funny cars. They don't get too hot, I never got a blister from them and they look really, really cool. ¡Oh! The tread pattern is unbeatable. Except for perhaps the inov-8 line of fell shoes, you won't find a better shoe for traction in the mud (and even that is a debatable point.