I would like to rate it 4.8, the only thing I don't like is it causes YouTube to completely freeze my computer.
So now I just turn it off (with Manage Extensions) when watching YouTube which is okay because I have an ad free YouTube account.

Very good. The best I've ever used.

Tooo good at blocking ads and malware

Great adblocker.

Awesome extension. Almost always only blocks ads and does not cause unintended side effects, like some of the other ad blocking extensions do.