I'm an illustrator and I find this pen does what it says!
You get a great white out of it, which doesn't sink into the paper or disappear after a few seconds like other white pens.
I use this pen frequently on wet and dry watercolour paper and it never lets me down.
No clogging up and no frustrating shaking required just simple, bold non fading colour.
Great product, great price, don't look any further!