I didn't see the point in these because I had always been Ok with a head torch.
However, since being bought one I have found it to be an excellent additional to my kit and I would miss not having it.
Well worth the money IMO
The line breaking on a naked helicopter set-up is something I discovered years ago, (1994ish), so came up with my own version using stiff tubing and rubber beads.
I have copied my post from years ago in Safe Lead set ups