It is of course the points that is interesting and helpful with this tool. Used with orthogonical views, one can add points actually onto a curve, not just one but several points symmetrically onto several curves.
I suppose I could save some trim-actions if things must be really accuratly modeled, so this tool could help me out on this.
But this yet, will all have to be experienced in a future project.
I cannot think of any examples right now