I used one for a bit at a store in Tokyo. It wasn't bad, although it wasn't quite like drawing on the screen of a PDA or something -- somehow seemed a little clumsier and less a feeling of actually drawing on a piece of paper. The stylus apparently acts as a kind of mouse, moving the cursor to where you press, so it seemed a little bit more removed than you might expect. Not sure if I am explaining this right, but it probably isn't a problem, just a difference.