I have two sets of the same ones, but probably only 100-200 miles on them. I think they work great, but they are certainly on the heavy side. I had one "break" by being unable to lock, but I loosened it all the way, pulled it apart, stuck the back of a knife blade in it and twisted it back the other way a bit, and when I slipped it back in it worked fine. One thing is to really learn how to use them. You should be compressing the antishock springs. Leki has some videos on their site.