This is a good app based on its available features. But it is very unpolished, it is not easy to learn, and it's slow. Despite all that, its competitors are lagging behind in features, TAO has pretty much everything on the "power outliner" wishlist (it doesn't have AppleScript yet, but I don't use it).

But I must admit, I'll be using this and hoping to dump it in favor of OmniOutliner if they get their act together and add some of these features. And with TAO's sometimes slow and occasionally buggy behavior (although usually minor), I could blame the fact that it's in beta, but this thing is always in beta so that's no excuse. The last non-beta release is a completely different app, and I would not use it.