It's an OK addon.
I can see it's not blocking as many "hidden spies" as other alternatives, but i do trust these guys more than companies like Ghostly and that's why i'm using Privacy Badger on all my browsers.

Hands off approach to privacy is good. Doesn't live off user data like other add-ons which is also a good.

I find it misses a lot of known trackers, which use other means to track the user, instead of cookies and Google Analytics bypasses this add-on with flying colors.

Privacy Badger protects you only from spying ads and invisible trackers. If you want to be protected also from all kinds of ads including an anti-adblock killer, want to use famous filter lists like EasyList, EasyPrivacy, Peter Lowe's Ad Server list, and many filters for malware protection, want cosmetic filter, an element picker for pushing away things you don't want to see anymore and to make your own filter rules, want a filter against obtrusive cookie notices, want an ad blocker with very low use of CPU and memory, than you have to take uBlock Origin