This is pretty much looking like a great plugin.
It looks a bit messy in term of replies. Big comment, small reply. Nearly looks unordered. Would be great to link the replies with the comments with an arrow or something.
I tried making the replies and comments get closer together, unfortunately it looks like it makes all comments squeeze closer too, which defeats the purpose. Maybe I should make replies a different color? Not sure if that's possible, but just flew into me head.
Lastly the plugin conflicts with the GASP plugin. A tick box anti spam plugin, which really does work well. If you forget to tick the box, a pop up appears, great. But when you go back and tick the box, spectacula hangs. A shame. Is there a work around?
Again, great plugin. I'm not sure if the developer is active on it or not?