I've been running in these shoes for a year now and couldnt be happier. Lightweight, breathable and quick drying. The traction is great in dry, dusty, rocky conditions, but not so hot for anything too wet or muddy. But I always switch to the Masochists for these kinds of conditions anyway. I use these shoes for shorter runs (<20miles) as I like slightly beefier shoes for going long. But these shoes rip it up on shorter, faster attempts and are my first choice for short races and tempo training. I know lots of people who use these on runs up to 50 miles, but thats not the case for me. Maybe someday Ill work up to that, but for now, they are my go-to daily trail runner.