This is one of the most satisfying apps I've ever used, after many unsatisfactory experiences with To Do List and, in particular, GTD applications.

A trivial example representative of bigger picture: The first time I used Things, I was struck by its treatment of columns... or rather its use of flexible columns. Applications generally take the view that a column should always be a column, whether or not a particular row contains data. If, for instance, you have a column containing tags, the column is present (and of fixed width) whether a particular item has zero tags or ten. With Things, an item's tag column expands if it has more tags, and it's invisible if it has no tags. Sound like trouble? It really isn't. In fact, it's beautiful. Try it and see.

The bigger picture that this trivial example illustrates is that the developers of this app have really considered the user experience, right down to questioning why things need to be done the way they've "always been done." They've created a gorgeous, streamlined app that really (finally!) helps me work through my list of tasks. Complaints? I have only one: I wish that there were slightly more visual feedback when clicking a checkbox.

It's a pleasure to synch Things with the iPhone version. I know that some have expressed difficulty: I've never had a synch problem. Beyond that, the pace of development is steady, and fresh iterations tend towards the "useful enhancement" rather than the "window dressing" end of the spectrum.

I should say that I also own the desktop and iPhone versions of OmniFocus, which is another fine application. If Things didn't exist, I'd probably be firing up OmniFocus, but I'd wince just a little every time. It isn't as pretty, nor as intuitive as Things, and in an effort to provide flexibility for list tweakers, it sacrifices a measure of elegance. Let me be clear: OmniFocus does not suck. I just think that Things makes it easier and more pleasant to get things done.