Another positive for Yak trax's. I use them at work durning a 10 hour shift in a ice and snow packed lot I work at reparing over the road tractors and trailers. They hold up very well with daily use. The tips have not worn down any, and even in the exteme cold have not failed in any way.
I've been using a pair at work for two winters now. The rubber has definitely lost quite a bit of elasticity and seems to be getting softer as well. I figure they'll last one more winter.