My Take
I used it initially to significant effect.
However, the application bugged, as soon as I started changing and shifting tags and sources.
I have asked for support. They were eager to help, but could not fix my issue. The infuriating part was another member of support joining in, trying to close the case before the issue was resolved. I was a premium user.
How I Use It
The extension is super intuitive. It helps you organize your ideas, following arguments and sources.