Pretty great. Blocks mostly all the annoying people pushed to the top of replies so working as intended. If there was one thing I'd add it'd be a way to add people to the "never block" list without having to open the queue some how.

EDIT: As of about May 20th 2024, this extension is no longer functional, possibly because of the domain name change of "Twitter" to "X" .com, but i dunno for sure, but it's for sure not working anymore