had 2 pairs and no complaints
bought the Sam hill V1 when it was launched, these lasted several years and eventually the sole went bald and the shoe split on the sides where the toes flex
bought the Sam hill V2 and these lasted 3 years until once again they wore out, started going balde and the shoes split on the sides where the toes flex, but I was doing lots of trail work in them
the bald sole never effected their grip on the pedals (if anything it was better as I could move my feet around a little more) but it was starting to stop me pushing up in mud where mud would clog what was left of the sole tread and cause slipping.
now have the new Karver high-top, really nice shoe. only got these because I could not find the Sam Hills in stock (maybe too popular?)
no complaints about 5-10, easily best flat pedal shoes for proper mountain biking