I am now approaching 300 miles on my Peregrines. I have read a number of posts on the internet about the upper breaking down prematurely. I have not had an issue with this on my shoes. The overlay is just starting to show signs of wear where the upper connects to the midsole along the crease or "break" above my toes. A little bit of the stitching is frayed but otherwise intact. The rubber toe protector did begin to separate but a bit of shoe glue seems to have fixed that just fine.
I have to say that the outsole of these shoes has held up remarkably well. I am quite pleased at how well these shoes have performed for me under a spectrum of conditions. Over the last several months these have become my trail shoe of choice and I find myself using them more than the Pure Grit or Pearl Izumis. As I ramp up my training for some upcoming ultras this autumn I will not hesitate to give the nod for another pair of Peregrines. This time the updated and revised Peregrine 2 model that is now available.