I've never been one for any sort of challenge on a game. I've replayed Final Fantasy IX multiple times, but I've never gone out of the way to make it more difficult than normal. I'd never be able to do the Excalibur II challenge simply because I'd hate myself for blowing through all the dialogue and plot progression, even if I do have almost every scene memorized. Still, I have to respect people who do this kind of stuff. I'd never dream of being able to do it.

Edit: Besides, the sword is absolutely useless anyway. Who cares about the added attack? Just spam Shock with Steiner anyway. It's all about the feeling of accomplishment, not about the benefits the sword might have in game.