Was going to give it a whirl until I saw it was a Chrome extension. I use Chrome but thus far resisted any content formatting extensions. Extensions feel a little too ActiveX control-ish for me.
The reason I think this extension makes sense is purely because users should have control over the way in which they read and see content. I'm not a big fan of restrictions being imposed on us just because some designer somewhere thought that's the way it should be. I've built in an editor that let's you create your own viewing interface. Give it a shot!