I currently have well over 15 unbreakable gathering tools. I try to keep the ones with a glyph, currently 10, in my shared storage but am constantly losing them among my 15 characters. It would be a matter of great convenience for me to have one of those. I am quiet sure that I would still lose them, as I do now, but I would gain back 9 of my 24 shared storage spaces. I have characters that I gear for WVW and other characters to roam and some that I still find time to PVE with so I am constantly swapping out the glyph tools to the character that I am playing on so that when I harvest or mine I am getting a chance at a little more. I would find it very useful.