i use these for trail running and they are the best pair of running shoes i've ever had.  i bought my first pair at a running store when i was out of town, where they measured my feet and analyzed my stride, arch, etc.  I ran in these for over a year (yeah, i know you're supposed to change running shoes out every 6 months but they were so comfortable and i had no issues whatsoever)...so i was thrilled to find the exact model and size on Amazon!  there was no break in period either!