Rated 5 out of 5 stars
Nice add-on, although I'm also using Stylish.
̶T̶h̶e̶r̶e̶ ̶a̶r̶e̶ ̶s̶o̶m̶e̶ ̶b̶u̶g̶s̶ ̶o̶n̶ ̶t̶h̶e̶ ̶e̶d̶i̶t̶o̶r
Yes, I know, as of now, this add-on is not a permanent replacement for Stylsih.
But after a few more releases may be one or two (around version 0.8) It will be able to totally transform a Stylish user to USM user :).
By the way, your bugs have been fixed in version 0.5.