We just had this fantastic review in from Ultra-runner Mark Hartell, he went out on the Welsh 3000's in winter with Stephen Watts (fellow Ultra-runner) to test out the Kahtoola KTS Aluminium Crampons.
Opinion Microspikes - Use with Care, or Not At All
Tempted to swap crampons for microspikes? Think hard, urges Tomas Frydrych. They have a place, but in the UK's mixed conditions they can also be a liability.