Pretty great extension. Do what it need to do, interface is nice and clean but its a pity that extension has no links towards places, where new styles can be found. Which makes it inferior to stylish, where you can find new styles for site just in one click. Its not a gamebreaker, but this small lack of usability keeps me from giving extention perfect score.

===edit===
Sorry, my bad. Didn't understand that maginfying glass is used for style search.