- Familiarity: I've put it through the wringer
These were my first pair of "bare-foot" style running shoes. And my first impressions were all positive: incredibly light weight, snug and comfortable fit, quick drying and most importantly the lack of heel to toe drop which made changing my running stride easier.
However about 3 months after purchasing them and only using them for about 300km. I found that the upper on both shoes was basically shredded to the point that it no longer supported my foot properly.
I used them primarily for shorter training runs (under 15km), excerpt for one 55km outing on some mountain trails which left my feet bruised for days- personally I wouldn't recommend them for anything much longer than 20 km if the trail is going to be especially rough, or if you are expecting lengthy stretches of running over scree- you're feet will likely pay for it. For my longer runs I alternate between a pair of la sportiva vertical ks and some Adidas trail shoes (whoes name I've forgotten).
For anyone looking for a lightweight, minimalist trail shoe with a heel-toe drop of 4mm but with a much softer feel and more protection I would recommend the Vertical K.