doesn't work

Does what it is supposed to do, nothing more nothing less.

Note that dislikes are estimated based on add-on user data, and do not show the true number of dislikes. However with the huge amount of installs (combined with Chrome web store) this paints a relative accurate picture, and you'll know if that one review/tutorial/trailer is actually worth watching.

The extension breaks 2-4 times a year, due to YouTube changing the website. But a patch to get the add-on working is never more than a week away.

Great for returning the dislike button, which was useful for gauging the validity of certain content.

Nothing else to say, that's all it really does and needs to do.