Works well.

Originally didn't like that it fully removes original twitch chat and instead attaches a chatterino window to the browser, thus making it impossible to use twitch features unsupported in chatterino like polls, predictions, etc. But I later figured out you can change this behavior by clicking on the chatterino extension icon in the toolbar and unticking "Replace Twitch chat". This way of using the extension is a lot closer to what I originally got it for, being able to have a "Watching" tab in a separate chatterino window while still being able to use default twitch chat for unsupported features, so overall I am now quite happy with this extension