Stylish and Rememberthemilk

I was reading the rmilk forums and came across this post. "it would be nice if the logo could be removed". It sounded like a good idea. I assumed it was a greasemonkey script. It turns out it uses Stylish.

Stylish is to CSS what Greasemonkey is to JavaScript, and unlike other methods of using user styles, most styles take effect immediately.

Does anyone use Stylish for anything or is this the first time you are hearing about it?