In reply to francoisecall:
I used one last winter. Love it. Can't see the problem with taking it on/off? I use the one including the pole section though so I just replaced the whole section at home.
With them I didn't see the need to carry a proper ice axe for any winter walks. They were fine for Scottish I gullies. Avoided the need to swap poles/axe every time I come across steep ground. The handle is very comfy for walking too.