It's good, but haven't tested it for too long. I use this extension as a back-up for videos with click-bait or sensationalized titles I want a alternative to, and do not use its titles and thumbnails as the default way to look at YouTube videos. The descriptive titles act more like titles to scientific papers in their betrayal of the contents of the video. It is of my opinion that titles of educational videos should be more descriptive and long. Artistic titles, and titles that have metaphors should have titles keep its integrity, and skits, artistic video strictly for non-informative entertainment shouldn't be changed.

But, a compromise should be reached for the people who think some ""REDDITORS'"" title changes are UNNECESSARY EARTH SHATTERING RUINING YouTube⸮, to these people I say look at your setting: "Behaviors > Default to Original Video Information" will make it opt-in, and you could only look at the DeArrow version when you want a more descriptive title. I also detest that asking users to pay for software that heavily relies on data hosted on a server is being called "shady", as you are normalizing developers being under funded enough to not be able to support their software. Servers cost money = server needs funding -> people unwilling to pay = hard to keep servers running/cost comes out of dev's pocket. With all of that out of the way, This is an biased review based on my use-case, but so was theirs, so now we get both sides of the coin.

A feature I personally think would be nice to add — but of course not mandatory — is a 70%-80% democratic vote for if a video is plagiarized, with a attached source to accompany it. This would greatly help push for more accountability within the "video essay" and "educational" online sphere.