Occasionally it stops working but that's YouTube's fault. I had a very old channel with only a few videos, most of which having only like 20 views, and it got the dislike count perfectly! I had to sign in to that old account just to make sure! The only thing holding it back from 5 stars is the fact that it can remain broken for a few days before an update fixes it. Also it doesn't work on the mobile interface or TV interface, but those are only slight things.