I've been wearing minimal shoes/racing shoes for 3-4 years without a problem but was finding after about 30 miles I needed something with cushioning. Also, where I live there are some very rocky trails so it was difficult to run fast with my usual shoes. I therefore bought the Hoka Bondi B's from Pete Bland (now down to £70 but only few sizes left) and have really enjoyed using them on the rocky trails where now I can run as fast as I like. Also, I recently ran a 43 mile race on West Highland Way and wore Inov8's racing flats for the first 20 miles and then switched to the Hokas for the rest of the race where it was very rocky, and they were very good. I found them a bit 'clumpy' to start with but now find them really comfortable. If you can get a pair from Pete Blands at the £70 price then it may be worth taking a punt.