Looks neat in theory, but in practice how is the experience? Can anyone who used it give some feedback?

I mean... Just look at how to comment some line:

`git appraise comment -f README.md -l 2 -m "Ah, so that's what this is" 1e6eb14c8014`

there is a web interface [1] and also an eclipse plugin [2]. It would be nice if there was an intellijplugin as well.