[egypturnash]

If all you need is text snippet replacements on your Mac, you can just visit the Keyboard pane of the system prefs. They'll sync to your iThings, too, albeit a little wonkily at times (like all iCloud syncing).

[wlesieutre]

Good point, I always forget that's built in now. aText would be for more advanced stuff like including dates or customizable fields in the snippets.