The binding wasn't caused by a kink in the wire was it.
I realise they aren't perfect, but I still pack them because they can handle a larger log than the smaller saws in SAK's etc.
All my multitools I carry have saws and they are always with me, so the tin has the wire saw for backup.
In my pack I have the Ultimate Survival Deluxe kit with the pocket chainsaw because its better performer, but this is a bit big for pockets.