[dcminter]

If you haven't tried them, the erasure is so complete that there's no trace of the previous writing - no ugly smudge on the paper, and they rarely if ever mess up the paper surface (at least in the Leuchterm or Moleskine notebooks that I prefer).

One of those things I'd have ignored for ever if I hadn't been shown them by a fellow student on a language class. I'm a complete convert to these now.

I particularly love them for scribbling ad-hoc diagrams in my notes and then being able to move things around without redrawing everything from scratch.

[J5892]

Just make sure your notebooks don't get too hot.

[dcminter]

I gather that one can then put them in the freezer and the ink will reappear - along with all the crossings-out of course. I've never actually tried this, but really must.

Also, remember to have a normal biro or fountain pen for signing important documents!