Rated 2 out of 5 stars
Epic FAIL: No search functionality.
I thought this add on was going to beat the CSS editor from the Web Developer toolbar (which for some reason isn't too friendly either, although it does have a search functionality), but no.
There are two things that this add on should have:
1. Search functionality (doh!)
2. CSS Syntax completion (which is something no CSS editor-add on has so far).
It does the job if you find your selector in a sea of declarations.